March is already summer here (Southern Hemisphere). We have all sorts of weird eccentricities due to "cultural norms" (we use snowflakes on our Christmas cards in mid-summer, whereas the Steam Summer Sale happens mid-winter).

Not to mention with climate change, we're probably going to have to deal with many other changes in season etc. anyway.

All of us deal with the fact that the day gets shorter and longer every year anyway (and daylight savings didn't seem to be a terribly good solution).

I think having the seasons slowly drift is a non-issue, provided it's just slow enough to not be noticeable from year to year.