SQL Developer: MY SQL Connection Error - The server time zone value 'CDT' is unrecognized

Status : Failure -Test failed: The server time zone value 'CDT' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support 

Add the following string after the port number

/?serverTimezone=CDT#

You can change 'CDT' in the string to the timezone that you recieved in the error.