"Thu, 08 Jan 1970 12:31:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
12:31:40
General datetime
1970-01-08 12:31:40Z
For Database
1970-01-08 12:31:40
For HTTP1.1
Thu, 08 Jan 1970 12:31:40 GMT