"Sat, 07 Feb 1970 23:32:44"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
23:32:44
General datetime
1970-02-07 23:32:44Z
For Database
1970-02-07 23:32:44
For HTTP1.1
Sat, 07 Feb 1970 23:32:44 GMT