"Fri, 23 Jan 1970 11:21:27"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700123
Only TIME
11:21:27
General datetime
1970-01-23 11:21:27Z
For Database
1970-01-23 11:21:27
For HTTP1.1
Fri, 23 Jan 1970 11:21:27 GMT