"Fri, 27 Feb 1970 11:25:56"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700227
Only TIME
11:25:56
General datetime
1970-02-27 11:25:56Z
For Database
1970-02-27 11:25:56
For HTTP1.1
Fri, 27 Feb 1970 11:25:56 GMT