"Fri, 09 Jan 1970 11:21:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
11:21:15
General datetime
1970-01-09 11:21:15Z
For Database
1970-01-09 11:21:15
For HTTP1.1
Fri, 09 Jan 1970 11:21:15 GMT