I’ll take any cold days period. I’d actually take super cold days on timeframes I don’t think is “peak” over warm days during the “best time”. that’s my opinion. Best on calendar- never Changes. Best for reality: having flexibility to hunt coldest days, etc. heck- the last week- the cold days have been super good. If it warms, I think it’ll slow. Then, just cross fingers we get nice solid cold streak from about the 5th on.... Any cold day up to gun season, I’d be out with bow if able. & of course if makes sense with not overpressuring ground, plenty spots & good entrances and exits.