"Sat, 07 Feb 1970 22:40:50"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700207
Only TIME
22:40:50
General datetime
1970-02-07 22:40:50Z
For Database
1970-02-07 22:40:50
For HTTP1.1
Sat, 07 Feb 1970 22:40:50 GMT