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