• now ?(-unix|-abs)?
Return the current time in seconds. If no argument is specified, it is the
number of seconds that have elapsed since Midnight Jan 1, 1904 (aka
the Mac epoch): this value is suitable for use with Alpha's [mtime]
command. With the -unix option, it is the number of
seconds since January 1 1970 00:00:00 GMT (aka the Unix epoch):
this value is suitable for use with Tcl's [file atime]
and [file mtime] commands.
With the -abs option, it is the time measured in seconds
relative to the absolute reference date of Jan 1 2001 00:00:00 GMT.