"Sun, 08 Feb 1970 14:45:54"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700208
Only TIME
14:45:54
General datetime
1970-02-08 14:45:54Z
For Database
1970-02-08 14:45:54
For HTTP1.1
Sun, 08 Feb 1970 14:45:54 GMT