"Thu, 08 Jan 1970 20:37:50"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
20:37:50
General datetime
1970-01-08 20:37:50Z
For Database
1970-01-08 20:37:50
For HTTP1.1
Thu, 08 Jan 1970 20:37:50 GMT