"Mon, 02 Feb 1970 11:04:21"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700202
Only TIME
11:04:21
General datetime
1970-02-02 11:04:21Z
For Database
1970-02-02 11:04:21
For HTTP1.1
Mon, 02 Feb 1970 11:04:21 GMT