"Tue, 06 Jan 1970 12:38:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700106
Only TIME
12:38:16
General datetime
1970-01-06 12:38:16Z
For Database
1970-01-06 12:38:16
For HTTP1.1
Tue, 06 Jan 1970 12:38:16 GMT