"Mon, 05 Jan 1970 09:17:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
09:17:51
General datetime
1970-01-05 09:17:51Z
For Database
1970-01-05 09:17:51
For HTTP1.1
Mon, 05 Jan 1970 09:17:51 GMT