"Fri, 23 Jan 1970 14:57:08"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
14:57:08
General datetime
1970-01-23 14:57:08Z
For Database
1970-01-23 14:57:08
For HTTP1.1
Fri, 23 Jan 1970 14:57:08 GMT