On New Years Day, I always defrost the freezer. Set the boxes of food outside in the cold while I tackle it.
It’s a good idea to replace a toothbrush every 3 months, so I do that the first day (or about) of January, April, July and Oct. January and July are my “6 month jobs” - for instance tip the mattress off and vacuum good under the bed. Helps me remember when I last did it.