"Fri, 23 Jan 1970 12:26:23"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
12:26:23
General datetime
1970-01-23 12:26:23Z
For Database
1970-01-23 12:26:23
For HTTP1.1
Fri, 23 Jan 1970 12:26:23 GMT