My nephew’s birthday is on Boxing Day, he’s going to be 6 this year. I’ve been to his birthday party (held on Boxing Day) every year since he was born, but it’s always a bit inconvenient - leaving Boxing Day lunch at in-laws early, cutting short out Boxing Day walk etc. The plan is always very disorganised - my sister doesn’t tell me a time to arrive until Boxing Day morning etc. And it’s never particularly enjoyable when I’m there - it’s clearly a chore for my sister and her husband is difficult, kids going crazy with overwhelming amount of presents etc. How can I gently tell her I don’t want to be there this year? I will of course get my nephew a gift as usual, and visit another day but I just don’t want to feel obliged to go every year? Any advice?? Am I being unreasonable? My sister is fiery and won’t take it well!