"Tue, 06 Jan 1970 14:49:19"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
14:49:19
General datetime
1970-01-06 14:49:19Z
For Database
1970-01-06 14:49:19
For HTTP1.1
Tue, 06 Jan 1970 14:49:19 GMT