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kosinix/Calendar formulas

Last active June 9, 2017 07:39
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Formula for displaying days in a Gregorian calendar month
Raw
Calendar formulas
prefixLength - The number of pads before the first calendar day
suffixLength - The number of pads after the last calendar day
monthFirstWeekDay - The weekday of first month day. int 0-6 where 0 is Sunday and 6 is Saturday
monthLastWeekDay - he weekday of last month day. int 0-6 where 0 is Sunday and 6 is Saturday
calendarWeekStart - The weekday to which the calendar days start. int 0-6 where 0 is Sunday and 6 is Saturday
Pseudocode:
prefixLength = monthFirstWeekDay - calendarWeekStart
if(prefixLength < 0){
prefixLength += 7;
}
suffixLength = 6 - (monthLastWeekDay - calendarWeekStart)
if(suffixLength > 6){
suffixLength = suffixLength - 7;
}
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