"Fri, 09 Jan 1970 23:35:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
23:35:35
General datetime
1970-01-09 23:35:35Z
For Database
1970-01-09 23:35:35
For HTTP1.1
Fri, 09 Jan 1970 23:35:35 GMT