A SQL script to create a Date dimension table with logic to specify fiscal dates.

CreateDateDimensionWithFiscals.sql

BEGIN TRY
    DROP TABLE [Dim].[Date]
END TRY

BEGIN CATCH
    /*No Action*/
END CATCH

CREATE TABLE [Dim].[Date]
(
    [DateKey] INT primary key, 
    [Date] DATETIME,
    [FullDate] CHAR(10),-- Date in MM-dd-yyyy format
    [DayOfMonth] VARCHAR(2), -- Field will hold day number of Month
    [DaySuffix] VARCHAR(4), -- Apply suffix as 1st, 2nd ,3rd etc
    [DayName] VARCHAR(9), -- Contains name of the day, Sunday, Monday 
    [DayOfWeek] CHAR(1),-- First Day Sunday=1 and Saturday=7
    [DayOfWeekInMonth] VARCHAR(2), --1st Monday or 2nd Monday in Month
    [DayOfWeekInYear] VARCHAR(2),
    [DayOfQuarter] VARCHAR(3), 
    [DayOfYear] VARCHAR(3),
    [WeekOfMonth] VARCHAR(1),-- Week Number of Month 
    [WeekOfQuarter] VARCHAR(2), --Week Number of the Quarter
    [WeekOfYear] VARCHAR(2),--Week Number of the Year
    [Month] VARCHAR(2), --Number of the Month 1 to 12
    [MonthName] VARCHAR(9),--January, February etc
    [MonthOfQuarter] VARCHAR(2),-- Month Number belongs to Quarter
    [Quarter] CHAR(1),
    [QuarterName] VARCHAR(9),--First,Second..
    [Year] CHAR(4),-- Year value of Date stored in Row
    [YearName] CHAR(7), --CY 2012,CY 2013
    [MonthYear] CHAR(10), --Jan-2013,Feb-2013
    [MMYYYY] CHAR(6),
    [FirstDayOfMonth] DATE,
    [LastDayOfMonth] DATE,
    [FirstDayOfQuarter] DATE,
    [LastDayOfQuarter] DATE,
    [FirstDayOfYear] DATE,
    [LastDayOfYear] DATE,
    [IsHoliday] BIT,-- Flag 1=National Holiday, 0-No National Holiday
    [IsWeekday] BIT,-- 0=Week End ,1=Week Day
    [HolidayName] VARCHAR(50),--Name of Holiday in US
)
GO

--=========================================================================================
--Specify Start Date and End date here
--Value of Start Date Must be Less than Your End Date 
--=========================================================================================

DECLARE @StartDate DATETIME = '12/29/2014' --Starting value of Date Range
DECLARE @EndDate DATETIME = '01/01/2100' --End Value of Date Range

--Temporary Variables To Hold the Values During Processing of Each Date of Year
DECLARE
    @DayOfWeekInMonth INT,
    @DayOfWeekInYear INT,
    @DayOfQuarter INT,
    @WeekOfMonth INT,
    @CurrentYear INT,
    @CurrentMonth INT,
    @CurrentQuarter INT

/*Table Data type to store the day of week count for the month and year*/
DECLARE @DayOfWeek TABLE
(
    DOW INT,
    MonthCount INT,
    QuarterCount INT,
    YearCount INT
)

INSERT INTO @DayOfWeek VALUES (1, 0, 0, 0)
INSERT INTO @DayOfWeek VALUES (2, 0, 0, 0)
INSERT INTO @DayOfWeek VALUES (3, 0, 0, 0)
INSERT INTO @DayOfWeek VALUES (4, 0, 0, 0)
INSERT INTO @DayOfWeek VALUES (5, 0, 0, 0)
INSERT INTO @DayOfWeek VALUES (6, 0, 0, 0)
INSERT INTO @DayOfWeek VALUES (7, 0, 0, 0)

--Extract and assign various parts of Values from Current Date to Variable

DECLARE @CurrentDate AS DATETIME = @StartDate
SET @CurrentMonth = DATEPART(MM, @CurrentDate)
SET @CurrentYear = DATEPART(YY, @CurrentDate)
SET @CurrentQuarter = DATEPART(QQ, @CurrentDate)

/********************************************************************************************/
--Proceed only if Start Date(Current date) is less than End date you specified above

WHILE @CurrentDate < @EndDate
/*Begin day of week logic*/
BEGIN
    /*Check for Change in Month of the Current date if Month changed then 
    Change variable value*/
    IF @CurrentMonth != DATEPART(MM, @CurrentDate) 
    BEGIN
        UPDATE @DayOfWeek
        SET [MonthCount] = 0
        SET @CurrentMonth = DATEPART(MM, @CurrentDate)
    END

    /* Check for Change in Quarter of the Current date if Quarter changed then change 
        Variable value*/
    IF @CurrentQuarter != DATEPART(QQ, @CurrentDate)
    BEGIN
        UPDATE @DayOfWeek
        SET [QuarterCount] = 0
        SET @CurrentQuarter = DATEPART(QQ, @CurrentDate)
    END

    /* Check for Change in Year of the Current date if Year changed then change 
        Variable value*/
    IF @CurrentYear != DATEPART(YY, @CurrentDate)
    BEGIN
        UPDATE @DayOfWeek
        SET YearCount = 0
        SET @CurrentYear = DATEPART(YY, @CurrentDate)
    END

    -- Set values in table data type created above from variables
    UPDATE @DayOfWeek
    SET 
        MonthCount = MonthCount + 1,
        QuarterCount = QuarterCount + 1,
        YearCount = YearCount + 1
    WHERE DOW = DATEPART(DW, @CurrentDate)

    SELECT
        @DayOfWeekInMonth = MonthCount,
        @DayOfQuarter = QuarterCount,
        @DayOfWeekInYear = YearCount
    FROM @DayOfWeek
    WHERE DOW = DATEPART(DW, @CurrentDate)
    
/*End day of week logic*/


/* Populate Your Dimension Table with values*/
    
    INSERT INTO [Dim].[Date]
    SELECT
        
        CONVERT (char(8),@CurrentDate,112) as 'DateKey',
        @CurrentDate AS 'Date',
        CONVERT (char(10),@CurrentDate,101) as 'FullDate',
        DATEPART(DD, @CurrentDate) AS 'DayOfMonth',
        --Apply Suffix values like 1st, 2nd 3rd etc..
        CASE 
            WHEN DATEPART(DD,@CurrentDate) IN (11,12,13) THEN CAST(DATEPART(DD,@CurrentDate) AS VARCHAR) + 'th'
            WHEN RIGHT(DATEPART(DD,@CurrentDate),1) = 1 THEN CAST(DATEPART(DD,@CurrentDate) AS VARCHAR) + 'st'
            WHEN RIGHT(DATEPART(DD,@CurrentDate),1) = 2 THEN CAST(DATEPART(DD,@CurrentDate) AS VARCHAR) + 'nd'
            WHEN RIGHT(DATEPART(DD,@CurrentDate),1) = 3 THEN CAST(DATEPART(DD,@CurrentDate) AS VARCHAR) + 'rd'
            ELSE CAST(DATEPART(DD,@CurrentDate) AS VARCHAR) + 'th' 
        END AS 'DaySuffix',
        
        DATENAME(DW, @CurrentDate) AS 'DayName',
        DATEPART(DW, @CurrentDate) AS 'DayOfWeek',
        @DayOfWeekInMonth AS 'DayOfWeekInMonth',
        @DayOfWeekInYear AS 'DayOfWeekInYear',
        @DayOfQuarter AS 'DayOfQuarter',
        DATEPART(DY, @CurrentDate) AS 'DayOfYear',
        DATEPART(WW, @CurrentDate) + 1 - DATEPART(WW, CONVERT(VARCHAR, DATEPART(MM, @CurrentDate)) + '/1/' + CONVERT(VARCHAR, DATEPART(YY, @CurrentDate))) AS 'WeekOfMonth',
        (DATEDIFF(DD, DATEADD(QQ, DATEDIFF(QQ, 0, @CurrentDate), 0), @CurrentDate) / 7) + 1 AS 'WeekOfQuarter',
        DATEPART(WW, @CurrentDate) AS 'WeekOfYear',
        DATEPART(MM, @CurrentDate) AS 'Month',
        DATENAME(MM, @CurrentDate) AS 'MonthName',
        CASE
            WHEN DATEPART(MM, @CurrentDate) IN (1, 4, 7, 10) THEN 1
            WHEN DATEPART(MM, @CurrentDate) IN (2, 5, 8, 11) THEN 2
            WHEN DATEPART(MM, @CurrentDate) IN (3, 6, 9, 12) THEN 3
        END AS 'MonthOfQuarter',
        DATEPART(QQ, @CurrentDate) AS 'Quarter',
        CASE DATEPART(QQ, @CurrentDate)
            WHEN 1 THEN 'First'
            WHEN 2 THEN 'Second'
            WHEN 3 THEN 'Third'
            WHEN 4 THEN 'Fourth'
        END AS 'QuarterName',
        DATEPART(YEAR, @CurrentDate) AS 'Year',
        'CY ' + CONVERT(VARCHAR, DATEPART(YEAR, @CurrentDate)) AS 'YearName',
        LEFT(DATENAME(MM, @CurrentDate), 3) + '-' + CONVERT(VARCHAR, DATEPART(YY, @CurrentDate)) AS 'MonthYear',
        RIGHT('0' + CONVERT(VARCHAR, DATEPART(MM, @CurrentDate)),2) + CONVERT(VARCHAR, DATEPART(YY, @CurrentDate)) AS 'MMYYYY',
        CONVERT(DATETIME, CONVERT(DATE, DATEADD(DD, - (DATEPART(DD, @CurrentDate) - 1), @CurrentDate))) AS 'FirstDayOfMonth',
        CONVERT(DATETIME, CONVERT(DATE, DATEADD(DD, - (DATEPART(DD, (DATEADD(MM, 1, @CurrentDate)))), DATEADD(MM, 1, @CurrentDate)))) AS 'LastDayOfMonth',
        DATEADD(QQ, DATEDIFF(QQ, 0, @CurrentDate), 0) AS 'FirstDayOfQuarter',
        DATEADD(QQ, DATEDIFF(QQ, -1, @CurrentDate), -1) AS 'LastDayOfQuarter',
        CONVERT(DATETIME, '01/01/' + CONVERT(VARCHAR, DATEPART(YY, @CurrentDate))) AS 'FirstDayOfYear',
        CONVERT(DATETIME, '12/31/' + CONVERT(VARCHAR, DATEPART(YY, @CurrentDate))) AS 'LastDayOfYear',
        NULL AS 'IsHoliday',
        CASE DATEPART(DW, @CurrentDate)
            WHEN 1 THEN 0
            WHEN 2 THEN 1
            WHEN 3 THEN 1
            WHEN 4 THEN 1
            WHEN 5 THEN 1
            WHEN 6 THEN 1
            WHEN 7 THEN 0
        END AS 'IsWeekday',
        NULL AS 'HolidayName'

    SET @CurrentDate = DATEADD(DD, 1, @CurrentDate)
END
        
--============================================================================
-- Step 3.
-- Update Values of Holiday as per USA Govt. Declaration for National Holiday.
--============================================================================

/*Update HOLIDAY Field of USA In dimension*/
    /* New Years Day - January 1 */
    UPDATE [Dim].[Date]
        SET HolidayName = 'New Year''s Day'
    WHERE [Month] = 1 AND [DayOfMonth] = 1

    /* Martin Luther King, Jr. Day - Third Monday in January starting in 1983 */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Martin Luther King, Jr. Day'
    WHERE
        [Month] = 1 AND
        [DayOfWeek] = 'Monday' AND
        [Year] >= 1983 AND
        DayOfWeekInMonth = 3

    /* Valentine's Day - February 14 */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Valentine''s Day'
    WHERE
        [Month] = 2 AND
        [DayOfMonth] = 14

    /* President's Day - Third Monday in February */
    UPDATE [Dim].[Date]
        SET HolidayName = 'President''s Day'
    WHERE
        [Month] = 2 AND
        [DayOfWeek] = 'Monday' AND
        [DayOfWeekInMonth] = 3

    /* Saint Patrick's Day */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Saint Patrick''s Day'
    WHERE
        [Month] = 3 AND
        [DayOfMonth] = 17

    /* Memorial Day - Last Monday in May */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Memorial Day'
    FROM [Dim].[Date]
    WHERE DateKey IN 
    (
        SELECT
            MAX(DateKey)
        FROM [Dim].[Date]
        WHERE
            [MonthName] = 'May' AND
            [DayOfWeek] = 'Monday'
        GROUP BY
            [Year],
            [Month]
    )

    /* Mother's Day - Second Sunday of May */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Mother''s Day'
    WHERE
        [Month] = 5 AND
        [DayOfWeek] = 'Sunday' AND
        [DayOfWeekInMonth] = 2

    /* Father's Day - Third Sunday of June */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Father''s Day'
    WHERE
        [Month] = 6 AND
        [DayOfWeek] = 'Sunday' AND
        [DayOfWeekInMonth] = 3

    /* Independence Day */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Independance Day'
    WHERE [Month] = 7 AND [DayOfMonth] = 4

    /* Labor Day - First Monday in September */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Labor Day'
    FROM [Dim].[Date]
    WHERE DateKey IN 
    (
        SELECT
            MIN(DateKey)
        FROM [Dim].[Date]
        WHERE
            [MonthName] = 'September' AND
            [DayOfWeek] = 'Monday'
        GROUP BY
            [Year],
            [Month]
    )

    /* Columbus Day - Second MONDAY in October */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Columbus Day'
    WHERE
        [Month] = 10 AND
        [DayOfWeek] = 'Monday' AND
        [DayOfWeekInMonth] = 2

    /* Halloween - 10/31 */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Halloween'
    WHERE
        [Month] = 10 AND
        [DayOfMonth] = 31

    /* Veterans Day - November 11 */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Veterans Day'
    WHERE
        [Month] = 11 AND
        [DayOfMonth] = 11
    
    /* Thanksgiving - Fourth THURSDAY in November */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Thanksgiving Day'
    WHERE
        [Month] = 11 AND
        [DayOfWeek] = 'Thursday' AND
        [DayOfWeekInMonth] = 4

    /* Christmas */
    UPDATE [Dim].[Date]
        SET HolidayName = 'Christmas Day'
    WHERE [Month] = 12 AND
          [DayOfMonth]  = 25
    
    /* Election Day - The first Tuesday after the first Monday in November */
    BEGIN
    DECLARE @Holidays TABLE
    (
        [ID] INT IDENTITY(1,1),
        [DateID] INT,
        [Week] TINYINT,
        [Year] CHAR(4),
        [Day] CHAR(2)
    )

        INSERT INTO @Holidays([DateID], [Year], [Day])
            SELECT
                [DateKey],
                [Year],
                [DayOfMonth] 
            FROM [Dim].[Date]
            WHERE
                [Month] = 11 AND 
                [DayOfWeek] = 'Monday'
            ORDER BY
                [Year],
                [DayOfMonth]

        DECLARE @CNTR INT,
                @POS INT,
                @STARTYEAR INT,
                @ENDYEAR INT,
                @MINDAY INT

        SELECT @CURRENTYEAR = MIN([Year])
             , @STARTYEAR = MIN([Year])
             , @ENDYEAR = MAX([Year])
        FROM @Holidays

        WHILE @CURRENTYEAR <= @ENDYEAR
        BEGIN
            SELECT @CNTR = COUNT([Year])
            FROM @Holidays
            WHERE [Year] = @CURRENTYEAR

            SET @POS = 1

            WHILE @POS <= @CNTR
            BEGIN
                SELECT @MINDAY = MIN(DAY)
                FROM @Holidays
                WHERE
                    [Year] = @CURRENTYEAR AND
                    [Week] IS NULL

                UPDATE @Holidays
                    SET [Week] = @POS
                WHERE
                    [Year] = @CURRENTYEAR AND
                    [Day] = @MINDAY

                SELECT @POS = @POS + 1
            END

            SELECT @CURRENTYEAR = @CURRENTYEAR + 1
        END

        UPDATE [Dim].[Date]
            SET HolidayName  = 'Election Day'
        FROM [Dim].[Date] DT
            JOIN @Holidays HL ON (HL.DateID + 1) = DT.DateKey
        WHERE
            [Week] = 1
    END
    --set flag for USA holidays in Dimension
    UPDATE [Dim].[Date]
        SET IsHoliday = CASE WHEN HolidayName IS NULL THEN 0
                                WHEN HolidayName IS NOT NULL THEN 1 END

/*****************************************************************************************/

/* Add Fiscal Calendar columns into table DimDate */

ALTER TABLE [Dim].[Date] ADD
    [FiscalDayOfYear] VARCHAR(3),
    [FiscalWeekOfYear] VARCHAR(3),
    [FiscalMonth] VARCHAR(2), 
    [FiscalQuarter] CHAR(1),
    [FiscalQuarterName] VARCHAR(9),
    [FiscalYear] CHAR(4),
    [FiscalYearName] CHAR(7),
    [FiscalMonthYear] CHAR(10),
    [FiscalMMYYYY] CHAR(6),
    [FiscalFirstDayOfMonth] DATE,
    [FiscalLastDayOfMonth] DATE,
    [FiscalFirstDayOfQuarter] DATE,
    [FiscalLastDayOfQuarter] DATE,
    [FiscalFirstDayOfYear] DATE,
    [FiscalLastDayOfYear] DATE

GO

/***************************************************************************
The following section needs to be populated for defining the fiscal calendar
***************************************************************************/

DECLARE
    @dtFiscalYearStart SMALLDATETIME = 'December 29, 2014',
    @FiscalYear INT = 2015,
    @LastYear INT = 2100,
    @FirstLeapYearInPeriod INT = 2012

/*****************************************************************************************/

DECLARE
    @iTemp INT,
    @LeapWeek INT,
    @CurrentDate DATETIME,
    @FiscalDayOfYear INT,
    @FiscalWeekOfYear INT,
    @FiscalMonth INT,
    @FiscalQuarter INT,
    @FiscalQuarterName VARCHAR(10),
    @FiscalYearName VARCHAR(7),
    @LeapYear INT,
    @FiscalFirstDayOfYear DATE,
    @FiscalFirstDayOfQuarter DATE,
    @FiscalFirstDayOfMonth DATE,
    @FiscalLastDayOfYear DATE,
    @FiscalLastDayOfQuarter DATE,
    @FiscalLastDayOfMonth DATE

/*Holds the years that have 455 in last quarter*/

DECLARE @LeapTable TABLE (leapyear INT)

/*TABLE to contain the fiscal year calendar*/

DECLARE @tb TABLE
(
    [PeriodDate] DATETIME,
    [FiscalDayOfYear] VARCHAR(3),
    [FiscalWeekOfYear] VARCHAR(3),
    [FiscalMonth] VARCHAR(2), 
    [FiscalQuarter] VARCHAR(1),
    [FiscalQuarterName] VARCHAR(9),
    [FiscalYear] VARCHAR(4),
    [FiscalYearName] VARCHAR(7),
    [FiscalMonthYear] VARCHAR(10),
    [FiscalMMYYYY] VARCHAR(6),
    [FiscalFirstDayOfMonth] DATE,
    [FiscalLastDayOfMonth] DATE,
    [FiscalFirstDayOfQuarter] DATE,
    [FiscalLastDayOfQuarter] DATE,
    [FiscalFirstDayOfYear] DATE,
    [FiscalLastDayOfYear] DATE
)

/*Populate the table with all leap years*/

SET @LeapYear = @FirstLeapYearInPeriod
WHILE (@LeapYear < @LastYear)
    BEGIN
        INSERT INTO @leapTable VALUES (@LeapYear)
        SET @LeapYear = @LeapYear + 6
    END

/*Initiate parameters before loop*/

SET @CurrentDate = @dtFiscalYearStart
SET @FiscalDayOfYear = 1
SET @FiscalWeekOfYear = 1
SET @FiscalMonth = 1
SET @FiscalQuarter = 1
SET @FiscalWeekOfYear = 1

IF (EXISTS (SELECT * FROM @LeapTable WHERE @FiscalYear = leapyear))
    BEGIN
        SET @LeapWeek = 1
    END
    ELSE
    BEGIN
        SET @LeapWeek = 0
    END

/*******************************************************************************************/

/* Loop on days in interval*/

WHILE (DATEPART(yy,@CurrentDate) <= @LastYear)
BEGIN
    
/*SET fiscal Month*/
    SELECT @FiscalMonth = CASE
        /* 
        /*Use this section for a 4-5-4 calendar.  
        Every leap year the result will be a 4-5-5*/
        WHEN @FiscalWeekOfYear BETWEEN 1 AND 4 THEN 1 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 5 AND 9 THEN 2 /*5 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 10 AND 13 THEN 3 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 14 AND 17 THEN 4 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 18 AND 22 THEN 5 /*5 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 23 AND 26 THEN 6 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 27 AND 30 THEN 7 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 31 AND 35 THEN 8 /*5 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 36 AND 39 THEN 9 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 40 AND 43 THEN 10 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 44 AND (48+@LeapWeek) THEN 11 /*5 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN (49+@LeapWeek) AND (52+@LeapWeek) THEN 12 /*4 weeks (5 weeks on leap year)*/
        */

        /*Use this section for a 4-4-5 calendar.  
        Every leap year the result will be a 4-5-5*/
        WHEN @FiscalWeekOfYear BETWEEN 1 AND 4 THEN 1 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 5 AND 8 THEN 2 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 9 AND 13 THEN 3 /*5 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 14 AND 17 THEN 4 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 18 AND 21 THEN 5 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 22 AND 26 THEN 6 /*5 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 27 AND 30 THEN 7 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 31 AND 34 THEN 8 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 35 AND 39 THEN 9 /*5 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 40 AND 43 THEN 10 /*4 weeks*/
        WHEN @FiscalWeekOfYear BETWEEN 44 AND (47+@leapWeek) THEN 11 /*4 weeks (5 weeks on leap year)*/
        WHEN @FiscalWeekOfYear BETWEEN (48 + @leapWeek) AND (52 + @leapWeek) THEN 12 /*5 weeks*/
        
    END

    /*SET Fiscal Quarter*/
    SELECT @FiscalQuarter = CASE 
        WHEN @FiscalMonth BETWEEN 1 AND 3 THEN 1
        WHEN @FiscalMonth BETWEEN 4 AND 6 THEN 2
        WHEN @FiscalMonth BETWEEN 7 AND 9 THEN 3
        WHEN @FiscalMonth BETWEEN 10 AND 12 THEN 4
    END
    
    SELECT @FiscalQuarterName = CASE 
        WHEN @FiscalMonth BETWEEN 1 AND 3 THEN 'First'
        WHEN @FiscalMonth BETWEEN 4 AND 6 THEN 'Second'
        WHEN @FiscalMonth BETWEEN 7 AND 9 THEN 'Third'
        WHEN @FiscalMonth BETWEEN 10 AND 12 THEN 'Fourth'
    END
    
    /*Set Fiscal Year Name*/
    SELECT @FiscalYearName = 'FY ' + CONVERT(VARCHAR, @FiscalYear)

    INSERT INTO @tb
    (
        PeriodDate,
        FiscalDayOfYear,
        FiscalWeekOfYear,
        FiscalMonth,
        FiscalQuarter,
        FiscalQuarterName,
        FiscalYear,
        FiscalYearName
    ) VALUES (
        @CurrentDate,
        @FiscalDayOfYear,
        @FiscalWeekOfYear,
        @FiscalMonth,
        @FiscalQuarter,
        @FiscalQuarterName,
        @FiscalYear,
        @FiscalYearName
    )

    /*SET next day*/
    SET @CurrentDate = DATEADD(dd, 1, @CurrentDate)
    SET @FiscalDayOfYear = @FiscalDayOfYear + 1
    SET @FiscalWeekOfYear = ((@FiscalDayOfYear-1) / 7) + 1


    IF (@FiscalWeekOfYear > (52+@LeapWeek))
    BEGIN
        /*Reset a new year*/
        SET @FiscalDayOfYear = 1
        SET @FiscalWeekOfYear = 1
        SET @FiscalYear = @FiscalYear + 1
        IF (EXISTS (SELECT * FROM @leapTable WHERE @FiscalYear = leapyear))
        BEGIN
            SET @LeapWeek = 1
        END
        ELSE
        BEGIN
            SET @LeapWeek = 0
        END
    END
END

/********************************************************************************************/

/*Set first and last days of the fiscal months*/
UPDATE @tb
SET
    FiscalFirstDayOfMonth = minmax.StartDate,
    FiscalLastDayOfMonth = minmax.EndDate
FROM
    @tb t,
    (
        SELECT
            FiscalMonth,
            FiscalQuarter,
            FiscalYear,
            MIN(PeriodDate) AS StartDate, 
            MAX(PeriodDate) AS EndDate
        FROM @tb
        GROUP BY
            FiscalMonth,
            FiscalQuarter,
            FiscalYear
    ) minmax

WHERE
    t.FiscalMonth = minmax.FiscalMonth AND
    t.FiscalQuarter = minmax.FiscalQuarter AND
    t.FiscalYear = minmax.FiscalYear 

/*Set first and last days of the fiscal quarters*/

UPDATE @tb
SET FiscalFirstDayOfQuarter = minmax.StartDate,
    FiscalLastDayOfQuarter = minmax.EndDate
FROM
    @tb t,
    (
        SELECT
            FiscalQuarter,
            FiscalYear,
            MIN(PeriodDate) as StartDate,
            MAX(PeriodDate) as EndDate
        FROM
            @tb
        GROUP BY
            FiscalQuarter,
            FiscalYear
    ) minmax
WHERE
    t.FiscalQuarter = minmax.FiscalQuarter AND
    t.FiscalYear = minmax.FiscalYear 

/*Set first and last days of the fiscal years*/

UPDATE @tb
SET
    FiscalFirstDayOfYear = minmax.StartDate,
    FiscalLastDayOfYear = minmax.EndDate
FROM
@tb t,
(
    SELECT FiscalYear, min(PeriodDate) as StartDate, max(PeriodDate) as EndDate
    FROM @tb
    GROUP BY FiscalYear
) minmax
WHERE
    t.FiscalYear = minmax.FiscalYear 

/*Set FiscalYearMonth*/
UPDATE @tb
SET
    FiscalMonthYear = 
        CASE FiscalMonth
        WHEN 1 THEN 'Jan'
        WHEN 2 THEN 'Feb'
        WHEN 3 THEN 'Mar'
        WHEN 4 THEN 'Apr'
        WHEN 5 THEN 'May'
        WHEN 6 THEN 'Jun'
        WHEN 7 THEN 'Jul'
        WHEN 8 THEN 'Aug'
        WHEN 9 THEN 'Sep'
        WHEN 10 THEN 'Oct'
        WHEN 11 THEN 'Nov'
        WHEN 12 THEN 'Dec'
        END + '-' + CONVERT(VARCHAR, FiscalYear)

/*Set FiscalMMYYYY*/
UPDATE @tb
SET
    FiscalMMYYYY = RIGHT('0' + CONVERT(VARCHAR, FiscalMonth),2) + CONVERT(VARCHAR, FiscalYear)

/********************************************************************************************/

UPDATE [Dim].[Date]
    SET FiscalDayOfYear = a.FiscalDayOfYear
      , FiscalWeekOfYear = a.FiscalWeekOfYear
      , FiscalMonth = a.FiscalMonth
      , FiscalQuarter = a.FiscalQuarter
      , FiscalQuarterName = a.FiscalQuarterName
      , FiscalYear = a.FiscalYear
      , FiscalYearName = a.FiscalYearName
      , FiscalMonthYear = a.FiscalMonthYear
      , FiscalMMYYYY = a.FiscalMMYYYY
      , FiscalFirstDayOfMonth = a.FiscalFirstDayOfMonth
      , FiscalLastDayOfMonth = a.FiscalLastDayOfMonth
      , FiscalFirstDayOfQuarter = a.FiscalFirstDayOfQuarter
      , FiscalLastDayOfQuarter = a.FiscalLastDayOfQuarter
      , FiscalFirstDayOfYear = a.FiscalFirstDayOfYear
      , FiscalLastDayOfYear = a.FiscalLastDayOfYear
FROM @tb a
    INNER JOIN [Dim].[Date] b ON a.PeriodDate = b.[Date]

/********************************************************************************************/

SELECT * FROM [Dim].[Date]

Code provides incorrect results for Fiscal columns

has there been a fix? I would love to use this.

has there been a fix? I would love to use this.

I am not sure. I copied this code from a blog post I found years ago. TBH, I don't even use this code anymore. I only keep it around for archival purposes.

Table name [Dim].[Date] is wrong. I updated it to [DimDate], the code run well. However, the result is still not 100% right. I am debugging it.

Thank you!!!

…

On Sat, Aug 15, 2020 at 8:55 PM zl20886 ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ Table name [Dim].[Date] is wrong. I updated it to [DimDate], the code run well. However, the result is still not 100% right. I am debugging it. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <https://gist.github.com/31ac69af102fcb5c805c#gistcomment-3418725>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AH6ZFPUBCGAJDUULBTTF6UTSA4VABANCNFSM4PZTKS3A> .

well you should remove the archive because its just more garbage floating to the top of google

Here's something that actually works. Start date = 1990, End date = 2030; Update is necessary

CREATE TABLE [dbo].[dimDate]( [DateKey] [int] NOT NULL, [Date] [date] NOT NULL, [Day] [tinyint] NOT NULL, [DaySuffix] [char](2) NOT NULL, [Weekday] [tinyint] NOT NULL, [WeekDayName] [varchar](10) NOT NULL, [WeekDayName_Short] [char](3) NOT NULL, [WeekDayName_FirstLetter] [char](1) NOT NULL, [DOWInMonth] [tinyint] NOT NULL, [DayOfYear] [smallint] NOT NULL, [WeekOfMonth] [tinyint] NOT NULL, [WeekOfYear] [tinyint] NOT NULL, [Month] [tinyint] NOT NULL, [MonthName] [varchar](10) NOT NULL, [MonthName_Short] [char](3) NOT NULL, [MonthName_FirstLetter] [char](1) NOT NULL, [Quarter] [tinyint] NOT NULL, [QuarterName] [varchar](6) NOT NULL, [Year] [int] NOT NULL, [YearMonth] [char](6) NOT NULL, [MMYYYY] [char](6) NOT NULL, [MonthYear] [char](7) NOT NULL, [IsWeekend] [bit] NOT NULL, [IsHoliday] [bit] NOT NULL, [HolidayName] [varchar](20) NULL, [SpecialDays] [varchar](20) NULL, [FinancialYear] [int] NULL, [FinancialQuater] [int] NULL, [FinancialMonth] [int] NULL, [FirstDateofYear] [date] NULL, [LastDateofYear] [date] NULL, [FirstDateofQuater] [date] NULL, [LastDateofQuater] [date] NULL, [FirstDateofMonth] [date] NULL, [LastDateofMonth] [date] NULL, [FirstDateofWeek] [date] NULL, [LastDateofWeek] [date] NULL, [CurrentYear] [smallint] NULL, [CurrentQuater] [smallint] NULL, [CurrentMonth] [smallint] NULL, [CurrentWeek] [smallint] NULL, [CurrentDay] [smallint] NULL, PRIMARY KEY CLUSTERED ( [DateKey] ASC )WITH (STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY] ) ON [PRIMARY] GO

`
TRUNCATE TABLE DimDate

DECLARE @CurrentDate DATE = '1990-01-01'
DECLARE @EndDate DATE = '2030-12-31'

WHILE @CurrentDate < @EndDate
BEGIN
INSERT INTO [dbo].[DimDate] (
[DateKey],
[Date],
[Day],
[DaySuffix],
[Weekday],
[WeekDayName],
[WeekDayName_Short],
[WeekDayName_FirstLetter],
[DOWInMonth],
[DayOfYear],
[WeekOfMonth],
[WeekOfYear],
[Month],
[MonthName],
[MonthName_Short],
[MonthName_FirstLetter],
[Quarter],
[QuarterName],
[Year],
[YearMonth],
[MMYYYY],
[MonthYear],
[IsWeekend],
[IsHoliday],
[FirstDateofYear],
[LastDateofYear],
[FirstDateofQuater],
[LastDateofQuater],
[FirstDateofMonth],
[LastDateofMonth],
[FirstDateofWeek],
[LastDateofWeek]
)
SELECT DateKey = YEAR(@CurrentDate) * 10000 + MONTH(@CurrentDate) * 100 + DAY(@CurrentDate),
DATE = @CurrentDate,
Day = DAY(@CurrentDate),
[DaySuffix] = CASE
WHEN DAY(@CurrentDate) = 1
OR DAY(@CurrentDate) = 21
OR DAY(@CurrentDate) = 31
THEN 'st'
WHEN DAY(@CurrentDate) = 2
OR DAY(@CurrentDate) = 22
THEN 'nd'
WHEN DAY(@CurrentDate) = 3
OR DAY(@CurrentDate) = 23
THEN 'rd'
ELSE 'th'
END,
WEEKDAY = DATEPART(dw, @CurrentDate),
WeekDayName = DATENAME(dw, @CurrentDate),
WeekDayName_Short = UPPER(LEFT(DATENAME(dw, @CurrentDate), 3)),
WeekDayName_FirstLetter = LEFT(DATENAME(dw, @CurrentDate), 1),
[DOWInMonth] = DAY(@CurrentDate),
[DayOfYear] = DATENAME(dy, @CurrentDate),
[WeekOfMonth] = DATEPART(WEEK, @CurrentDate) - DATEPART(WEEK, DATEADD(MM, DATEDIFF(MM, 0, @CurrentDate), 0)) + 1,
[WeekOfYear] = DATEPART(wk, @CurrentDate),
[Month] = MONTH(@CurrentDate),
[MonthName] = DATENAME(mm, @CurrentDate),
[MonthName_Short] = UPPER(LEFT(DATENAME(mm, @CurrentDate), 3)),
[MonthName_FirstLetter] = LEFT(DATENAME(mm, @CurrentDate), 1),
[Quarter] = DATEPART(q, @CurrentDate),
[QuarterName] = CASE
WHEN DATENAME(qq, @CurrentDate) = 1
THEN 'First'
WHEN DATENAME(qq, @CurrentDate) = 2
THEN 'second'
WHEN DATENAME(qq, @CurrentDate) = 3
THEN 'third'
WHEN DATENAME(qq, @CurrentDate) = 4
THEN 'fourth'
END,
[Year] = YEAR(@CurrentDate),
[YearMonth] = CAST(YEAR(@CurrentDate) AS VARCHAR(4)) + RIGHT('0' + CAST(MONTH(@CurrentDate) AS VARCHAR(2)), 2),
[MMYYYY] = RIGHT('0' + CAST(MONTH(@CurrentDate) AS VARCHAR(2)), 2) + CAST(YEAR(@CurrentDate) AS VARCHAR(4)),
[MonthYear] = CAST(YEAR(@CurrentDate) AS VARCHAR(4)) + UPPER(LEFT(DATENAME(mm, @CurrentDate), 3)),
[IsWeekend] = CASE
WHEN DATENAME(dw, @CurrentDate) = 'Sunday'
OR DATENAME(dw, @CurrentDate) = 'Saturday'
THEN 1
ELSE 0
END,
[IsHoliday] = 0,
[FirstDateofYear] = CAST(CAST(YEAR(@CurrentDate) AS VARCHAR(4)) + '-01-01' AS DATE),
[LastDateofYear] = CAST(CAST(YEAR(@CurrentDate) AS VARCHAR(4)) + '-12-31' AS DATE),
[FirstDateofQuater] = DATEADD(qq, DATEDIFF(qq, 0, GETDATE()), 0),
[LastDateofQuater] = DATEADD(dd, - 1, DATEADD(qq, DATEDIFF(qq, 0, GETDATE()) + 1, 0)),
[FirstDateofMonth] = CAST(CAST(YEAR(@CurrentDate) AS VARCHAR(4)) + '-' + CAST(MONTH(@CurrentDate) AS VARCHAR(2)) + '-01' AS DATE),
[LastDateofMonth] = EOMONTH(@CurrentDate),
[FirstDateofWeek] = DATEADD(dd, - (DATEPART(dw, @CurrentDate) - 1), @CurrentDate),
[LastDateofWeek] = DATEADD(dd, 7 - (DATEPART(dw, @CurrentDate)), @CurrentDate)

SET @CurrentDate = DATEADD(DD, 1, @CurrentDate)
END

--Update Holiday information
UPDATE DimDate
SET [IsHoliday] = 1,
[HolidayName] = 'Christmas'
WHERE [Month] = 12
AND [DAY] = 25

UPDATE DimDate
SET SpecialDays = 'Valentines Day'
WHERE [Month] = 2
AND [DAY] = 14

--Update current date information
UPDATE DimDate
SET CurrentYear = DATEDIFF(yy, GETDATE(), DATE),
CurrentQuater = DATEDIFF(q, GETDATE(), DATE),
CurrentMonth = DATEDIFF(m, GETDATE(), DATE),
CurrentWeek = DATEDIFF(ww, GETDATE(), DATE),
CurrentDay = DATEDIFF(dd, GETDATE(), DATE)

`

well you should remove the archive because its just more garbage floating to the top of google

Yes 100% should be deleted, its first hit in my google search

Sorry guys, not gonna delete. I'm not in control of Google's algorithm and I can't explain why this all of a sudden started showing for you all. If I have time, I'll update later, but this is low priority for me and I'd still like to keep it around for future reference.

Might I have a question: Why are the columns Month, Year,... nvarchar instead of numeric?

Sorry guys, not gonna delete. I'm not in control of Google's algorithm and I can't explain why this all of a sudden started showing for you all. If I have time, I'll update later, but this is low priority for me and I'd still like to keep it around for future reference.

Why would you keep this garbage code around for future reference? It does not work and is far from elegant. Don't be a cancer to the open-source community.

I second that, please remove code which doesn't work!

I have a question...

I have a Calendar Table in my DB (DimDate), from 01-01-2000 to 31-12-2020.

How can i add automatically all rows for current year 2021?

Thanks!