As stated above, file time is operating-system dependent. As of this writing, two formats are used. For unix and Windows systems, file time is the number of seconds since midnight January 1, 1970 UTC (the standard unix time convention).
The following procedures generate their results in file-time format:
file-access-time file-access-time-direct file-access-time-indirect file-modification-time file-modification-time-direct file-modification-time-indirect file-attributes/access-time file-attributes/modification-time file-attributes/change-time
set-file-times! accepts its time arguments in