Last year, neighbours 10 doors down had a garden party for their nine year old's birthday from midday to 11 pm. They had music blaring out at nightclub volume during all that time so that, unless you enjoyed that relentless bass beat and the screeching of the overexcited dj, at least 30 neighbours' gardens would have been a no relax zone for for the whole of that day. I remember thinking that I was glad I hadn't organised a party myself for that day as it would have been totally ruined. Same thing has happened today but we've got friends due at 7 for a barbecue and it's going to ruin our night.
My Aibu is this. I know it's during the day and only once a year ( so far this year at least) but surely when houses are so close together it's the height of selfishness to impose that level of noise for such a long time without at least letting your neighbours know in advance so they can be prepared. Aibu to expect some warning from neighbours if they are planning such a loud, long event so that I can adjust my plans accordingly. It's during the day, so I know reporting it will be a waste of time. Wwyd