"Mon, 23 Feb 1970 23:32:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700223
Only TIME
23:32:20
General datetime
1970-02-23 23:32:20Z
For Database
1970-02-23 23:32:20
For HTTP1.1
Mon, 23 Feb 1970 23:32:20 GMT