"Fri, 06 Feb 1970 19:45:46"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700206
Only TIME
19:45:46
General datetime
1970-02-06 19:45:46Z
For Database
1970-02-06 19:45:46
For HTTP1.1
Fri, 06 Feb 1970 19:45:46 GMT