"Mon, 09 Feb 1970 01:01:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700209
Only TIME
01:01:37
General datetime
1970-02-09 01:01:37Z
For Database
1970-02-09 01:01:37
For HTTP1.1
Mon, 09 Feb 1970 01:01:37 GMT