Our school year doesn't end until June 25, and I don't think too many kids would be showing up for class if they tried extending it beyond that.
We had 3 snow days allotted for this school year. We've used two, and are on a two hour delay right now. There is probably about 5 - 6 inches of snow on the ground, so it's a toss up whether they'll be able to get the kid in today or not. There is another storm forecast for Thursday and Friday, and it's supposed to be a significant one.
Our Easter break is from March 29 - April 2. If we go past our three snow days, we'll lose March 29, then the 30, and then the 31. They don't have a plan in place for anything past that.
Snow days are part of the reason that I stick to the summer break for our vacations. Our break is in the latter part of August, when we get the free dining, and I KNOW school isn't going to be in session.