Hi, Tumnus!
Earlier, you posted December was also a rough month for you and that you use a light box. Though the unhappy anniversary comes in January, would it be fair to say this whole two- (three?) month period multiplies triggers for you well beyond normal?
"Forewarned is forearmed." Have you discussed in therapy how you might prepare for this season's trials? I would hope, over time, you would become increasingly adept and navigating the emotions of December-January. May it be!
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My dog

mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.