ns_httptime3

This function converts the time (specified as the number of seconds from 00:00:00 UTC, January 1, 1970) to the appropriate format for an HTTP header or log file. The time and date is returned with a four digit year, for example: "Sun, 06 Nov 1994 08:49:37 GMT".

ns_parsehttptime takes a properly formatted HTTP time and returns the number of seconds since 00:00:00 UTC Jan 1, 1970.

set time [ns_httptime [ns_time]]
Returns: Thu, 14 Nov 2002 17:29:06 GMT

set time "Thu, 14 Nov 2002 17:29:06 GMT"
ns_parsehttptime $time
Returns: 1037294946