"Fri, 23 Jan 1970 12:33:27"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
12:33:27
General datetime
1970-01-23 12:33:27Z
For Database
1970-01-23 12:33:27
For HTTP1.1
Fri, 23 Jan 1970 12:33:27 GMT