Set your clock to 24h for best results.

A simple windows backup example:

echo test once then you can double click to backup
exit -1
net stop Noodle
TASKKILL /T /F /IM java.exe
net stop PostgreSQL-9.1
FOR /F "TOKENS=1 eol=/ DELIMS=-" %%A IN ('DATE/T') DO SET yyyy=%%A
FOR /F "TOKENS=2 eol=/ DELIMS=-" %%A IN ('DATE/T') DO SET mm=%%A
FOR /F "TOKENS=3 eol=/ DELIMS=- " %%A IN ('DATE/T') DO SET dd=%%A
FOR /F "TOKENS=1 eol=/ DELIMS=:" %%A IN ('TIME/T') DO SET hh=%%A
FOR /F "TOKENS=2 eol=/ DELIMS=:" %%A IN ('TIME/T') DO SET mn=%%A
SET timedate=%yyyy%%mm%%dd%_%hh%%mn%
SET FOLDER=D:\PGSQL_data_backup_%timedate%
xcopy /E /C /I /H /Q "C:\Program Files (x86)\PostgreSQL\9.1\data" %FOLDER%
net start PostgreSQL-8.4
net start Noodle
"C:\Program Files (x86)\7-Zip\7z.exe" a %FOLDER%.7z %FOLDER%
rmdir /S /Q %FOLDER%
echo %FOLDER%.7z