"Sat, 07 Feb 1970 12:33:36"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
12:33:36
General datetime
1970-02-07 12:33:36Z
For Database
1970-02-07 12:33:36
For HTTP1.1
Sat, 07 Feb 1970 12:33:36 GMT