"Thu, 08 Jan 1970 21:13:51"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700108
Only TIME
21:13:51
General datetime
1970-01-08 21:13:51Z
For Database
1970-01-08 21:13:51
For HTTP1.1
Thu, 08 Jan 1970 21:13:51 GMT