"Thu, 08 Jan 1970 20:40:59"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
20:40:59
General datetime
1970-01-08 20:40:59Z
For Database
1970-01-08 20:40:59
For HTTP1.1
Thu, 08 Jan 1970 20:40:59 GMT