@echo off
:: code by 随风 @bbs.bathome.net   2007/12/13
set n=500
for /f "tokens=1,2 delims=:" %%a in ("%time%") do (
   set /a s=100%%a%%100,f=100%%b%%100+n
)
set /a y=f/60,h=f%%60,s=(s+y)%%24
set h=00%h%
set ok=%s%:%h:~-2%
echo %ok%
pause
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