"Sat, 02 May 1970 07:11:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700502
Only TIME
07:11:44
General datetime
1970-05-02 07:11:44Z
For Database
1970-05-02 07:11:44
For HTTP1.1
Sat, 02 May 1970 07:11:44 GMT