"Tue, 06 Jan 1970 12:33:12"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
12:33:12
General datetime
1970-01-06 12:33:12Z
For Database
1970-01-06 12:33:12
For HTTP1.1
Tue, 06 Jan 1970 12:33:12 GMT