When our oldest was in K the policy was 10 days for the year.
He had strep and I didn't know I needed an excuse (missed a week) and then a few days after he was back my grandmother died and we were gone a week for the funeral. A week after we got back we got a very, very nasty letter, threatening us if he missed any more days.
I called the school because I thought it was a mistake. They knew why he had missed, I had called them. It got passed through to the principal who said that was the rule. ("hard and fast") I said, you know we were at a funeral and had to go out of town (4 hours away). He said we should have left our son home to go to school. He was 5 so I am not sure how that would have worked, since all our family lived out of town, in the place the funeral was.
I had to call our dr and get a note for the strep.
I laugh about it all the time now