"Mon, 12 Jan 1970 09:14:47"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700112
Only TIME
09:14:47
General datetime
1970-01-12 09:14:47Z
For Database
1970-01-12 09:14:47
For HTTP1.1
Mon, 12 Jan 1970 09:14:47 GMT