It's more like, who wants to wait more than 30 days for a package to get delivered. Each yearly task takes specific tools and ingredients, that you can't wait for.
There is a certain yearly rhythm, so people are on 30 day schedules. 1 month of harvest in the fall (October) 1 month of processing the food (November) 1 month of swapping and trading food (December) 1 month of keeping animals alive in winter (January) 1 month of animal husbandry (February) 1 month of winter planting (March) 1 month of birthing new animals (April) 1 month of spring plating (May) 1 month of early harvests (June) 1 month of tending to planted crops (July) 1 month of travel (August) 1 month of making clothing and other things (September)