"Sat, 07 Feb 1970 12:03:32"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
12:03:32
General datetime
1970-02-07 12:03:32Z
For Database
1970-02-07 12:03:32
For HTTP1.1
Sat, 07 Feb 1970 12:03:32 GMT