"Mon, 02 Feb 1970 12:33:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700202
Only TIME
12:33:47
General datetime
1970-02-02 12:33:47Z
For Database
1970-02-02 12:33:47
For HTTP1.1
Mon, 02 Feb 1970 12:33:47 GMT