"Fri, 20 Feb 1970 07:51:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700220
Only TIME
07:51:00
General datetime
1970-02-20 07:51:00Z
For Database
1970-02-20 07:51:00
For HTTP1.1
Fri, 20 Feb 1970 07:51:00 GMT