"Tue, 06 Jan 1970 18:26:13"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
18:26:13
General datetime
1970-01-06 18:26:13Z
For Database
1970-01-06 18:26:13
For HTTP1.1
Tue, 06 Jan 1970 18:26:13 GMT