"Fri, 09 Jan 1970 14:14:39"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
14:14:39
General datetime
1970-01-09 14:14:39Z
For Database
1970-01-09 14:14:39
For HTTP1.1
Fri, 09 Jan 1970 14:14:39 GMT