Gets the month, day, hour of the day, and minutes of the hour in which a particular save was recorded.
If the save file does not exist, then the %month parameter is set to 0.
EX）
savetime 3,%0,%1,%2,%3
if %0=0 goto *non
`Save 3 was recorded on %0 / %1, %2 : %3.@
end
*non
`Save 3 nonexistent.@
end