"Fri, 02 Jan 1970 00:55:38"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
00:55:38
General datetime
1970-01-02 00:55:38Z
For Database
1970-01-02 00:55:38
For HTTP1.1
Fri, 02 Jan 1970 00:55:38 GMT