"Fri, 09 Jan 1970 14:50:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700109
Only TIME
14:50:55
General datetime
1970-01-09 14:50:55Z
For Database
1970-01-09 14:50:55
For HTTP1.1
Fri, 09 Jan 1970 14:50:55 GMT