"Tue, 03 Feb 1970 14:46:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700203
Only TIME
14:46:02
General datetime
1970-02-03 14:46:02Z
For Database
1970-02-03 14:46:02
For HTTP1.1
Tue, 03 Feb 1970 14:46:02 GMT