"Tue, 10 Feb 1970 21:42:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700210
Only TIME
21:42:00
General datetime
1970-02-10 21:42:00Z
For Database
1970-02-10 21:42:00
For HTTP1.1
Tue, 10 Feb 1970 21:42:00 GMT