"Sun, 08 Feb 1970 18:24:48"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700208
Only TIME
18:24:48
General datetime
1970-02-08 18:24:48Z
For Database
1970-02-08 18:24:48
For HTTP1.1
Sun, 08 Feb 1970 18:24:48 GMT