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This challenge will be judged by community reviewers using subjective scorecards. Although the code and documentation quality are important as always, the main focus will be to select submission that creates the best user experience within challenge requirements, and, probably, develop the proposed idea with some creative addons.
P.S.: If the idea about the trends in data caused by a holiday does not make much sense to you, and you have a better idea how IBM Watson Discovery can be used with these data to produce a cool user experience, feel free to do it. Once again: the hard requirements are to use IBM Watson Discovery, and any other technologies povided by IBM Cloud (and to avoid using non-IBM techs); to use the data provided in the forum; and to provide a cool user experience that (i) impress users; (ii) clearly shows the value of IBM Watson Discovery service in this application.