"Tue, 06 Jan 1970 09:16:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
09:16:20
General datetime
1970-01-06 09:16:20Z
For Database
1970-01-06 09:16:20
For HTTP1.1
Tue, 06 Jan 1970 09:16:20 GMT