"Tue, 10 Feb 1970 18:11:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700210
Only TIME
18:11:48
General datetime
1970-02-10 18:11:48Z
For Database
1970-02-10 18:11:48
For HTTP1.1
Tue, 10 Feb 1970 18:11:48 GMT