"Sun, 08 Feb 1970 12:02:24"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700208
Only TIME
12:02:24
General datetime
1970-02-08 12:02:24Z
For Database
1970-02-08 12:02:24
For HTTP1.1
Sun, 08 Feb 1970 12:02:24 GMT