"Tue, 06 Jan 1970 11:02:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
11:02:39
General datetime
1970-01-06 11:02:39Z
For Database
1970-01-06 11:02:39
For HTTP1.1
Tue, 06 Jan 1970 11:02:39 GMT