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Big flags go up for me here reading about your strategy. Why would someone expecting a Christmas page want to be shown a Valentine Day's page? Always look to the user experience as a guide to fixing your problems. Sure, some traffic might convert, but also look at the scenario from Google's perspective. You have all these links and traffic about Christmas now going to a page about Valentines day. How is that relevant? Deploying this method will actually cause you to lose rankings. Stay on target and keep the right traffic lined up with the right content, and instead, use your marketing efforts to boost the rankings for the correct holiday near the correct dates. Hope this helps.