"Fri, 02 Jan 1970 00:38:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
00:38:23
General datetime
1970-01-02 00:38:23Z
For Database
1970-01-02 00:38:23
For HTTP1.1
Fri, 02 Jan 1970 00:38:23 GMT