"Mon, 12 Jan 1970 18:16:25"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
18:16:25
General datetime
1970-01-12 18:16:25Z
For Database
1970-01-12 18:16:25
For HTTP1.1
Mon, 12 Jan 1970 18:16:25 GMT