Prints out the last day of the current month.

lastDayOfCurrentMonth.cmd

@ECHO OFF
REM Prints out the last day of the current month.
REM
REM Author: Florian Wolters <florian.wolters.85@googlemail.com>
REM Link..: http://github.com/FlorianWolters
REM
REM Copyright (C) 2012 by Florian Wolters. All rights reserved.
REM
REM This program is free software: you can redistribute it and/or modify it
REM under the terms of the GNU Lesser General Public License as published by the
REM Free Software Foundation, either version 3 of the License, or (at your
REM option) any later version.
REM
REM This program is distributed in the hope that it will be useful, but WITHOUT
REM ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
REM FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
REM for more details.
REM
REM You should have received a copy of the GNU Lesser General Public License
REM along with this program. If not, see http://gnu.org/licenses/lgpl.txt.

SETLOCAL

REM Uncomment and set for tests.
REM SET DATE=01.02.2012

SET CURRENT_MONTH=%DATE:~3,2%
SET CURRENT_YEAR=%DATE:~6,4%
SET RESULT_DAY=31

FOR %%? IN (04 06 09 11) DO IF %CURRENT_MONTH%==%%? SET RESULT_DAY=30
IF NOT %CURRENT_MONTH% == 02 GOTO EOF

REM Check whether the year is a leap year.
:CHECK_LEAP_YEAR
SET /A ISLEAP=%CURRENT_YEAR% %% 4
IF NOT %ISLEAP% == 0 GOTO NOT_LEAP_YEAR
SET /A ISLEAP=%CURRENT_YEAR% %% 100
IF NOT %ISLEAP% == 0 GOTO IS_LEAP_YEAR
SET /A ISLEAP=%CURRENT_YEAR% %% 400
IF NOT %ISLEAP% == 0 GOTO NOT_LEAP_YEAR

:IS_LEAP_YEAR
SET RESULT_DAY=29
GOTO EOF

:NOT_LEAP_YEAR
SET RESULT_DAY=28

:EOF
SET RESULT=%RESULT_DAY%
ECHO %RESULT%

Requirements

• Microsoft Windows version 6.1.7601 ("Microsoft Windows 7")

NOTICE: May also work with older versions.

Usage

1. Write the result to the standard output (STDOUT).

lastDayOfCurrentMonth.cmd

1. Write the result to a text file.

lastDayOfCurrentMonth.cmd > debug.log

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this program. If not, see http://gnu.org/licenses/lgpl.txt.