Safe way to get current day month and year in batch - windows

Question

I am trying to write a batch script that will get the current day, month and year in a safe manner(i.e. independent of the date format). Unfortunately all the internet sources I have found propose something like:
SET CURRENT_DATE=%DATE: =0%
SET YEAR=%DATE:~-4%
SET MONTH=%DATE:~3,2%
SET DAY=%DATE:~5,2%
This will work if my date is in format yyyy/mm/dd or yyyy-mm-dd but will not if it is in format yy-mm-dd or some other format. Is there a safe way to get the year, month and day?
And one more question - is it possible to know what the day separator is(/ in the first case and - in the other cases).

Answer 1

The first four lines of this code will give you reliable YY DD MM YYYY HH Min Sec variables in XP Pro and higher.
#echo off
for /f "tokens=2 delims==" %%a in ('wmic OS Get localdatetime /value') do set "dt=%%a"
set "YY=%dt:~2,2%" & set "YYYY=%dt:~0,4%" & set "MM=%dt:~4,2%" & set "DD=%dt:~6,2%"
set "HH=%dt:~8,2%" & set "Min=%dt:~10,2%" & set "Sec=%dt:~12,2%"
set "datestamp=%YYYY%%MM%%DD%" & set "timestamp=%HH%%Min%%Sec%"
set "fullstamp=%YYYY%-%MM%-%DD%_%HH%-%Min%-%Sec%"
echo datestamp: "%datestamp%"
echo timestamp: "%timestamp%"
echo fullstamp: "%fullstamp%"
pause
Here is a VBS solution:
:: date time using WSH/VBS
:: datetime.bat V4.2
::::::::::::::::::::::::::::::::::::::::::::::::::::::::
::
:: This uses Windows Scripting Host to set variables to
:: the current date/time/day/day_number/week_of_year etc
:: for Win9x/ME/NT/W2K/XP/Vista/Win7/Win8 etc
:: Thanks go to Todd Vargo for his scripting
::
::::::::::::::::::::::::::::::::::::::::::::::::::::::::
#echo off
set TmpFile="%temp%.\tmp.vbs"
echo> %TmpFile% n=Now
echo>>%TmpFile% With WScript
echo>>%TmpFile% .Echo "set m1=" + monthname(month(n), true)
echo>>%TmpFile% .Echo "set m2=" + monthname(month(n), false)
echo>>%TmpFile% .Echo "set woy=" + CStr(datepart("ww", n))
echo>>%TmpFile% .Echo "set year=" + CStr(Year(n))
echo>>%TmpFile% .Echo "set yr=" + Right(Year(n),2)
echo>>%TmpFile% .Echo "set month="+ Right(100+Month(n),2)
echo>>%TmpFile% .Echo "set day=" + Right(100+Day(n),2)
echo>>%TmpFile% .Echo "set hour=" + Right(100+Hour(n),2)
echo>>%TmpFile% .Echo "set min=" + Right(100+Minute(n),2)
echo>>%TmpFile% .Echo "set sec=" + Right(100+Second(n),2)
echo>>%TmpFile% .Echo "set dow=" + WeekDayName(Weekday(n),1)
echo>>%TmpFile% .Echo "set dow2=" + WeekDayName(Weekday(n))
echo>>%TmpFile% .Echo "set iso=" + CStr(1 + Int(n-2) mod 7)
echo>>%TmpFile% .Echo "set iso2=" + CStr(Weekday(n,2))
echo>>%TmpFile% End With
cscript //nologo "%temp%.\tmp.vbs" > "%temp%.\tmp.bat"
call "%temp%.\tmp.bat"
del "%temp%.\tmp.bat"
del %TmpFile%
set TmpFile=
set stamp=%year%-%month%-%day%.%hour%_%min%_%sec%
if not "%~1"=="" goto :EOF
echo The year is "%year%" or "%yr%"
echo The month is "%month%" "%m1%" "%m2%"
echo The day is "%day%" "%dow%" "%dow2%"
echo.
echo ISO8601 Day-Of-Week number is "%iso%" and week of year is: "%woy%"
echo.
echo The time in hh:mm:ss is "%hour%:%min%:%sec%"
echo The hour is "%hour%"
echo The minute is "%min%"
echo The second is "%sec%"
echo.
echo The date and time stamp is "%stamp%"
echo.
echo date A yyyymmdd "%year%%month%%day%"
echo date B mmddyyyy "%month%%day%%year%"
echo date C ddmmyyyy "%day%%month%%year%"
echo date D yymmdd "%yr%%month%%day%"
echo date E mmddyy "%month%%day%%yr%"
echo date F ddmmyy "%day%%month%%yr%"
pause
:: datetime.bat
::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

Answer 2

First, you could retrieve the current settings from the registry (somewhere).
The format and also the separators.
But it's easier to use wmic instead, it has always the same format, the only drawback is, that it's take a bit of time, each time you start it.
Modified sample from SO: Log Date/Time
#echo off
setlocal EnableDelayedExpansion
FOR /F "skip=1 tokens=1-6" %%A IN ('WMIC Path Win32_LocalTime Get Day^,Hour^,Minute^,Month^,Second^,Year /Format:table') DO (
if "%%B" NEQ "" (
SET /A FDATE=%%F*10000+%%D*100+%%A
SET /A FTIME=%%B*10000+%%C*100+%%E
)
)
ECHO !FDATE! - !FTIME!

Answer 3

Extract Day, Month and Year (locale-independent)
I wouldn't use WMIC since it's very high on resources and takes awhile to complete, especially on slower computers. The following script takes the users' localization from the registry, which is locale-independent. As far as I know is is the only batch solution that works. Of course you can also use a call to a VBScript but for me that's off-topic.
#echo off
::: Begin set date
setlocal EnableExtensions EnableDelayedExpansion
:: Determine short date format (independent from localization) from registry
for /f "skip=1 tokens=3-5 delims=- " %%L in ( '2^>nul reg query "HKCU\Control Panel\International" /v "sShortDate"' ) do (
:: Since we can have multiple (short) date formats we only use the first char from the format in a new variable
set "_L=%%L" && set "_L=!_L:~0,1!" && set "_M=%%M" && set "_M=!_M:~0,1!" && set "_N=%%N" && set "_N=!_N:~0,1!"
:: Now assign the date values to the new vars
for /f "tokens=2-4 delims=/-. " %%D in ( "%date%" ) do ( set "!_L!=%%D" && set "!_M!=%%E" && set "!_N!=%%F" )
)
:: Print the values as is
echo.
echo This is the original date string --^> %date%
echo These are the splitted values --^> Day: %d%, Month:%m%, Year: %y%.
echo.
endlocal
Extract only the Year
For a script I wrote I wanted only to extract the year (locale-independent) so I came up with this oneliner as I couldn't find any solution. It uses the 'DATE' var, multiple delimiters and checks for a number greater than 31. That then will be the current year. It's low on resources in contrast to some of the other solutions.
#echo off
setlocal EnableExtensions
for /f " tokens=2-4 delims=-./ " %%D in ( "%date%" ) do ( if %%D gtr 31 ( set "_YEAR=%%D" ) else ( if %%E gtr 31 ( set "_YEAR=%%E" ) else ( if %%F gtr 31 ( set "_YEAR=%%F" ) ) ) )
echo And the year is... %_YEAR%.
echo.
endlocal