"Fri, 13 Feb 1970 23:32:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700213
Only TIME
23:32:20
General datetime
1970-02-13 23:32:20Z
For Database
1970-02-13 23:32:20
For HTTP1.1
Fri, 13 Feb 1970 23:32:20 GMT