"Mon, 12 Jan 1970 05:54:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
05:54:15
General datetime
1970-01-12 05:54:15Z
For Database
1970-01-12 05:54:15
For HTTP1.1
Mon, 12 Jan 1970 05:54:15 GMT