"Fri, 02 Jan 1970 12:52:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
12:52:20
General datetime
1970-01-02 12:52:20Z
For Database
1970-01-02 12:52:20
For HTTP1.1
Fri, 02 Jan 1970 12:52:20 GMT