"Mon, 02 Feb 1970 19:45:49"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700202
Only TIME
19:45:49
General datetime
1970-02-02 19:45:49Z
For Database
1970-02-02 19:45:49
For HTTP1.1
Mon, 02 Feb 1970 19:45:49 GMT