"Fri, 06 Feb 1970 22:40:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700206
Only TIME
22:40:55
General datetime
1970-02-06 22:40:55Z
For Database
1970-02-06 22:40:55
For HTTP1.1
Fri, 06 Feb 1970 22:40:55 GMT