AITAH for skipping daughter’s graduation?

In January we planned our family vacation to the beach for this year, once we realized we could actually afford to go.

The only reservations left in the area and price point we were going was mid-May, 10-15th, which is the last week of school.

Normally exams and all of schoolwork is finished by then and the last week is just games and movies, etc.

So we booked, which works great because of mother’s day and two of our birthdays.

Today I realized that since my oldest daughter is in 6th grade, her class will actually have an elementary graduation ceremony that week.

(Small school, 1 class for each grade…17 students. They will go across campus to the high school building for 7th grade.)

She will miss the photos, the pomp and circumstance, and the memories of graduation with her friends.

If we cancel our vacation, we won’t get our money back and we won’t be able to afford to reschedule this year.

AITAH for screwing up the planning here?