"Mon, 02 Feb 1970 04:35:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700202
Only TIME
04:35:35
General datetime
1970-02-02 04:35:35Z
For Database
1970-02-02 04:35:35
For HTTP1.1
Mon, 02 Feb 1970 04:35:35 GMT