"Wed, 18 Feb 1970 07:54:41"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700218
Only TIME
07:54:41
General datetime
1970-02-18 07:54:41Z
For Database
1970-02-18 07:54:41
For HTTP1.1
Wed, 18 Feb 1970 07:54:41 GMT