"Mon, 12 Jan 1970 18:25:14"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
18:25:14
General datetime
1970-01-12 18:25:14Z
For Database
1970-01-12 18:25:14
For HTTP1.1
Mon, 12 Jan 1970 18:25:14 GMT