"Fri, 23 Jan 1970 12:31:32"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
12:31:32
General datetime
1970-01-23 12:31:32Z
For Database
1970-01-23 12:31:32
For HTTP1.1
Fri, 23 Jan 1970 12:31:32 GMT