"Mon, 05 Jan 1970 14:07:03"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
14:07:03
General datetime
1970-01-05 14:07:03Z
For Database
1970-01-05 14:07:03
For HTTP1.1
Mon, 05 Jan 1970 14:07:03 GMT