"Fri, 09 Jan 1970 10:00:42"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
10:00:42
General datetime
1970-01-09 10:00:42Z
For Database
1970-01-09 10:00:42
For HTTP1.1
Fri, 09 Jan 1970 10:00:42 GMT