To be annoyed with myself for not organising dd's party sooner?

[Jellified]

Dd and another child have birthdays a week apart and they have a number of mutual friends. Every year said child and family do stuff for child's birthday and without fail have party on dd's birthday or nearest weekend. Needless to say I never get my invitations out first so, dd ends up with lots of refusals. Can't do ours the following week as end of term and lots of people will be away.
Next year the invitations will be sent at least a month in advance

Joint party?
Or you and the other parent agree days so as not to clash?

What would you like the other parent to do? YABU. be more organised.

Do both parties last the whole weekend?? Are they university students breaking up for term??

Joint party? Liaise with the other parents so you don't clash? And failing all that get your party organised earlier. DD's is mid Jan so I have to get hers organised and invitations out before Christmas if we're having the party the weekend before, otherwise it's only a few days after term starts. I then have to get DS's organised and invitations out before DD's takes place. It can be done.

When I was at school a class mate had his birthday 2 days before mine, so we had a similar issue with party clashes (we had a similar circle of friends). So my mum and his sat down and agreed that the weekend closest to our birthdays he would have his party on the Friday evening or Sunday (the best days for his mum), and mine on the Saturday.
That system worked for our entire primary school life. That way we both got to invite everyone, and they all came.
I think you need to do something similar - hold your party either the day before or the day after this year, and then discuss a system that works for you both.

See that makes me not unreasonable ie I should be annoyed with myself. Too late for joint parties as birthday next week. Also dd not invited so a joint party isn't on the cards. Both want sleepovers so 2 in a weekend probably a bit much.

What a out having a sleepover on the last day of school (mid week) .... Would that work?

P.s that makes a lot of sense little princess. And yes I know I need to be more organised. Maybe next year......

YANBU for being annoyed with yourself.

Lesson learnt - get planning earlier next year,

My dd and her friend have birthdays a day apart, their parties are in the same venue consecutively so their mutual friends will be at the venue for 5 hours! It's my DD's actual birthday but she's thrilled to be their for almost an entire day!

My DD has two friends whose birthdays are the same day. They are 8 and have known each other since being babies, they have always shared parties. However this year they have grown apart a little, so they are doing a mix and match birthday weekend (they live in the same street too). So, each is having a sleepover on Friday night with about three friends at their own homes. Then they are doing family stuff separately on the Saturday, then the combined group of friends is going to the cinema on the Sunday. Would something like that work? Do you know the other parents well enough?