"Sun, 04 Jan 1970 05:56:41"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700104
Only TIME
05:56:41
General datetime
1970-01-04 05:56:41Z
For Database
1970-01-04 05:56:41
For HTTP1.1
Sun, 04 Jan 1970 05:56:41 GMT