Some command line tools ask for the UNIX time. If you’re using Jscript, this is no a problem. But VBscript doesn’t have a function that does this.
So here is some nice one-liner that gives the UNIX time
WScript.echo DateDiff("s", "12/31/1969 00:00:00", _
DateSerial(Year(Now), Month(Now), Day(Now)) _
+ TimeSerial(Hour(Now), Minute(Now), Second(Now)))