"Tue, 10 Feb 1970 14:45:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700210
Only TIME
14:45:20
General datetime
1970-02-10 14:45:20Z
For Database
1970-02-10 14:45:20
For HTTP1.1
Tue, 10 Feb 1970 14:45:20 GMT