"Thu, 08 Jan 1970 19:40:43"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
19:40:43
General datetime
1970-01-08 19:40:43Z
For Database
1970-01-08 19:40:43
For HTTP1.1
Thu, 08 Jan 1970 19:40:43 GMT