"Tue, 24 Feb 1970 12:03:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700224
Only TIME
12:03:42
General datetime
1970-02-24 12:03:42Z
For Database
1970-02-24 12:03:42
For HTTP1.1
Tue, 24 Feb 1970 12:03:42 GMT