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call:dayOfYear JD DateStr |
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:dayOfYear JD DateStr -- returns the day of the year, i.e. 1 for 1/1/2008, 266 for 12/31/2008
:: -- day [out,opt] - variable name to store resulting day of the year
:: -- DateStr [in,opt] - date string, e.g. "3/31/2006" or "Fri 03/31/2006" or "31.3.2006", or omit form current date
:$reference https://groups.google.com/group/alt.msdos.batch.nt/browse_frm/thread/a0c34d593e782e94/50ed3430b6446af8#50ed3430b6446af8
:$created 20080612 :$changed 20080612 :$categories DateAndTime
:$source https://www.dostips.com
SETLOCAL
set "DateStr=%~2"&if "%~2"=="" set "DateStr=%date%"
for /f "skip=1 tokens=2-4 delims=(-)" %%a in ('"echo.|date"') do (
for /f "tokens=1-3 delims=/.- " %%A in ("%DateStr:* =%") do (
set %%a=%%A&set %%b=%%B&set %%c=%%C))
set /a "yy=10000%yy% %%10000,mm=100%mm% %% 100,dd=100%dd% %% 100"
set /a JD=dd-32075+1461*(yy+4800+(mm-14)/12)/4+367*(mm-2-(mm-14)/12*12)/12-3*((yy+4900+(mm-14)/12)/100)/4
set /a "yy=10000%yy% %%10000,mm=1,dd=1"
set /a JD-=-1+dd-32075+1461*(yy+4800+(mm-14)/12)/4+367*(mm-2-(mm-14)/12*12)/12-3*((yy+4900+(mm-14)/12)/100)/4
ENDLOCAL & IF "%~1" NEQ "" (SET %~1=%JD%) ELSE (echo.%JD%)
EXIT /b
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