"Tue, 03 Feb 1970 15:13:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700203
Only TIME
15:13:12
General datetime
1970-02-03 15:13:12Z
For Database
1970-02-03 15:13:12
For HTTP1.1
Tue, 03 Feb 1970 15:13:12 GMT