"Fri, 20 Feb 1970 11:25:28"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700220
Only TIME
11:25:28
General datetime
1970-02-20 11:25:28Z
For Database
1970-02-20 11:25:28
For HTTP1.1
Fri, 20 Feb 1970 11:25:28 GMT