"Tue, 06 Jan 1970 14:37:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
14:37:23
General datetime
1970-01-06 14:37:23Z
For Database
1970-01-06 14:37:23
For HTTP1.1
Tue, 06 Jan 1970 14:37:23 GMT