"Thu, 08 Jan 1970 23:31:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
23:31:20
General datetime
1970-01-08 23:31:20Z
For Database
1970-01-08 23:31:20
For HTTP1.1
Thu, 08 Jan 1970 23:31:20 GMT