"Tue, 03 Feb 1970 19:39:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700203
Only TIME
19:39:38
General datetime
1970-02-03 19:39:38Z
For Database
1970-02-03 19:39:38
For HTTP1.1
Tue, 03 Feb 1970 19:39:38 GMT