You actually pointed to one of the veggies that negates what I (and Jerry) just said about very cold weather (30’s and under) arrests the growth of even cold weather crops. Sorrel absolutely doesn’t seem affected, and there are others like that so we are just talking about “most” cold weather crops.
I’ll be interested to see what others say, but I really dislike the “days to maturity” that they put on seeds because I find them to be wildly inaccurate. I guess they have to put some numbers to give new gardeners some ball park idea of what to expect (there are some new growers who don’t know that radishes produce sooner than pumpkins, for example). But there are soooo many variables that effect days to maturity. Weather (as you are seeing), soil fertility, rain/moisture, whether fertilize is used, whether your plants are in full sun or not, etc etc. In perfect growing conditions vs terrible conditions, the same seeds planted in each location will have vastly different maturity dates. So in short I don’t think days to maturity are very useful AT ALL. A big part of my experience with all this comes from watermelons. My harvest times often vary a LOT from the DTM posted on the seed packets. But that is just me…others may love DTM estimates and think they are fairly accurate?