"Fri, 30 Jan 1970 18:15:35"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700130
Only TIME
18:15:35
General datetime
1970-01-30 18:15:35Z
For Database
1970-01-30 18:15:35
For HTTP1.1
Fri, 30 Jan 1970 18:15:35 GMT