"Fri, 02 Jan 1970 21:13:04"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700102
Only TIME
21:13:04
General datetime
1970-01-02 21:13:04Z
For Database
1970-01-02 21:13:04
For HTTP1.1
Fri, 02 Jan 1970 21:13:04 GMT