"Sat, 14 Feb 1970 07:45:24"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700214
Only TIME
07:45:24
General datetime
1970-02-14 07:45:24Z
For Database
1970-02-14 07:45:24
For HTTP1.1
Sat, 14 Feb 1970 07:45:24 GMT