"Mon, 19 Jan 1970 14:56:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
14:56:19
General datetime
1970-01-19 14:56:19Z
For Database
1970-01-19 14:56:19
For HTTP1.1
Mon, 19 Jan 1970 14:56:19 GMT