Rename file with timestamp

::https://stackoverflow.com/questions/203090/how-do-i-get-current-date-time-on-the-windows-command-line-in-a-suitable-format

For /f "tokens=2-4 delims=/ " %%a in ('date /t') do (set mydate=%%c-%%a-%%b)
For /f "tokens=1-2 delims=/:" %%a in ("%TIME%") do (set mytime=%%a%%b)
set renamed_time=%mydate%_%mytime%
ren c:\new\file.txt file_%renamed_time%.txt
xcopy d:\file.txt c:\new\file.txt