"Tue, 06 Jan 1970 14:49:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
14:49:23
General datetime
1970-01-06 14:49:23Z
For Database
1970-01-06 14:49:23
For HTTP1.1
Tue, 06 Jan 1970 14:49:23 GMT