"Tue, 13 Jan 1970 00:56:16"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700113
Only TIME
00:56:16
General datetime
1970-01-13 00:56:16Z
For Database
1970-01-13 00:56:16
For HTTP1.1
Tue, 13 Jan 1970 00:56:16 GMT