"Mon, 19 Jan 1970 14:46:17"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700119
Only TIME
14:46:17
General datetime
1970-01-19 14:46:17Z
For Database
1970-01-19 14:46:17
For HTTP1.1
Mon, 19 Jan 1970 14:46:17 GMT