"Mon, 05 Jan 1970 03:44:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700105
Only TIME
03:44:54
General datetime
1970-01-05 03:44:54Z
For Database
1970-01-05 03:44:54
For HTTP1.1
Mon, 05 Jan 1970 03:44:54 GMT