get the difference between two date

how get the difference between two dete?

when i use: Call TodaySerial some time function return negative incorrect data.

dude, will you ever use search? nsdate works perfectly and there are plenty of alternatives (FileTimeDiff looks just like what you need). next time search for yourself!

StrCpy $0 "%Y.%m.%d-%H.%M"
nsisdt::currentdate
MessageBox MB_OK "Date=$0"

i search thi source return %Y.%m.%d-%H.%M !!!

i am not work with File.i known how get time but how difference date i dont known(