mktime Turn a datespec (YYYY MM DD HH MM SS) into a timestamp strftime Format a specified time to the given format as defined by strftime() systime Return the Unix Time stamp (Epoch)
2009-01-03 10:15:05 2009-01-08 18:54:25 2009-01-13 12:46:54
1231006505
Is equivalent to: 01/03/2009 @ 6:15pm (UTC) 2009-01-03T18:15:05+00:00 in ISO 8601 Sat, 03 Jan 2009 18:15:05 +0000 in RFC 822, 1036, 1123, 2822 Saturday, 03-Jan-09 18:15:05 UTC in RFC 2822 2009-01-03T18:15:05+00:00 in RFC 3339