"Mon, 16 Feb 1970 04:42:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700216
Only TIME
04:42:35
General datetime
1970-02-16 04:42:35Z
For Database
1970-02-16 04:42:35
For HTTP1.1
Mon, 16 Feb 1970 04:42:35 GMT