"Mon, 05 Jan 1970 05:54:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
05:54:55
General datetime
1970-01-05 05:54:55Z
For Database
1970-01-05 05:54:55
For HTTP1.1
Mon, 05 Jan 1970 05:54:55 GMT