>>772 bat
@echo off &setlocal
call :Conv_uTime2iso 1000000000
call :Conv_uTime2iso 1234567890
pause&exit /b
:Conv_uTime2iso
set /a "GD=(UT=%~1)/86400+719468, h=100+(R=UT%%86400)/3600, n=100+(R%%=3600)/60, s=100+R%%60, y=400*(GD/146097), y+=100*(i=(R=GD%%146097)/36524), y+=(R%%=36524)/1461*4, y+=j=(R%%=1461)/365, R=R%%365+365*(L=(i|j)/4), f=(k=(R*5+2)/153)/10, d=R+101-(306*k+4)/10, m=k+103-f*12, y+=f-L"
echo %y%-%m:~-2%-%d:~-2%T%h:~-2%:%n:~-2%:%s:~-2%