"Fri, 09 Jan 1970 05:31:37"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
05:31:37
General datetime
1970-01-09 05:31:37Z
For Database
1970-01-09 05:31:37
For HTTP1.1
Fri, 09 Jan 1970 05:31:37 GMT