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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

SIL having a party on brother’s birthday

274 replies

StarAstrid · 18/10/2024 17:21

Just really interested to hear opinions on this.
My SIL (49) has decided to have a big party to celebrate her 50th birthday. She has decided to hold it on my DH’s (her brother’s) actual birthday as it’s a Saturday. Her birthday is 2 weeks later but she is busy then. My DH is annoyed that she has booked this date as birthdays are rarely on a Saturday and neither of his parents or any other family members think it’s an issue for her to hold the party on his birthday. He says that’s not how he wants to celebrate his birthday and so at the moment he won’t go. Is he being unreasonable or would you also be annoyed if your sibling did this? Thanks for reading.

OP posts:
Coffeeandcocktails · 18/10/2024 18:33

Arranging your birthday party on your siblings birthday seems really immature IMO. Like a stealing the limelight situation.
If that isn’t what she’s doing then she’ll be happy to “share” her party so it is also recognised as DH birthday too!

If you’ve already made birthday plans without his family I’d just stick with them and attending the party could just be an option for later in the night.

Eddielizzard · 18/10/2024 18:35

I think it's odd to hold the party before your birthday. More natural to look at a date 2 weeks after your birthday. And on your DH's birthday who is everyone going to say 'happy birthday' to? I don't think this is a nice thing to do, unless there was really good reason not to hold it later. If there's a backstory, I would be pissed off. I would most likely book a weekend away and not be around for the drama she's wanting to create

LlynTegid · 18/10/2024 18:37

So called big birthdays or milestone birthdays are the thing I object to, every birthday is still one day. No such thing as a birthday week either.

Probably how displeased I would be might depend also on what the 'being busy' on the actual day is.

Spirallingdownwards · 18/10/2024 18:38

I am surprised that a 50 year old woman has a 5 year old child as a brother and that child has a wife. He needs to grow up. He can go to dinner or whatever it is he does for his birthday the evening before or the day after or any other time.

Demonhunter · 18/10/2024 18:38
Confused Rooster Teeth GIF by Achievement Hunter

MN can be so contrary. When someone posts about their birthday being disappointing, a good proportion of posters say about how it's not stupid for you to have that one special day for you, and will go to lengths to explain why, then in the next birthday thread, people are called pathetic for being miffed that a sibling wants to have a birthday party 2 weeks early and overshadow their "special day"

Isthisreasonable · 18/10/2024 18:39

user47 · 18/10/2024 17:57

I'd be delighted - everyone will bring him presents too and he'll be spoiled because she arranged it that way. And he gets a great party, with people he'll like, on his birthday. It's ideal isn't it?

Are you sure? She wants a 50th party but is too "busy" to have it the weekend of her birthday. So the party isn't being prioritised over whatever is happening that weekend or the weekends either side. Their parents are supportive of the decision to takeover her DBs birthday. Unless they share a friendship group, the guests will be her friends not his. Why would her friends be bringing him gifts?

She hasn't approached it from a stance of "it would be great to have a joint party", this is all about her. It sounds like he won't have his birthday acknowledged.

If the hijacking of his birthday is that upsetting at his age, I suspect this has been a pattern over the years.

GiveMeTheFormula · 18/10/2024 18:40

What are the chances that the only possible day she could have organised a party was on her brothers birthday?

Devonjaguar · 18/10/2024 18:41

SilverChampagne · 18/10/2024 18:22

Why does it matter whether he minds or not? Lots of things will be taking place on his birthday, he doesn’t own the flaming day.

Just think it is common courtesy to do so. I wouldn't mind if someone held a party on my birthday but I'd expect them to let me know/run it past me first out of respect. I would also do the same to someone else if I knew the dates clashed.

WonderingWanda · 18/10/2024 18:42

How old is your dh? If he is over the age of 21 then he really needs to get over himself. As an adult you can celebrate your birthday on any day. How does he want to celebrate and can't he just do that on a different Sat instead?

CRD67 · 18/10/2024 18:43

You and you DH should go and...hijack it, take it over as his birthday party! You SIL cannot deny him celebrating on his actual birthday, your DH could say as much "it's my birthday, yours is in two weeks". 😁

HolyPeaches · 18/10/2024 18:43

StarAstrid · 18/10/2024 18:12

Thank you for all your replies. Some interesting views. There won’t be many people there that we know as they are a small family so it’ll mainly consist of her friends. I think those that suggested there is a backstory are probably onto something and I think he feels the date hasn’t been chosen purely on convenience. Having said that I think we should probably go as it saves any arguments.

Why does it matter if it’ll be mostly her friends there? It’s her party!

Don’t go if you don’t want to.

Or go for an hour to show your faces then go off and celebrate your man child’s husbands birthday somewhere else.

Life really shouldn’t be this difficult or complicated.

HMW1906 · 18/10/2024 18:43

Is there going to be a drip feed and they’re twins and it’s his 50th too?? If not can’t he just do something the weekend before or after or on the Friday evening? He’s not a child surely he can understand that sometimes other events will fall on his birthday.

MumblesParty · 18/10/2024 18:43

If your DH is really bothered, he could always say “great idea, a joint birthday party, I’ll bring a cake and banner for me too”. Then she might change the date!

SilverChampagne · 18/10/2024 18:46

CRD67 · 18/10/2024 18:43

You and you DH should go and...hijack it, take it over as his birthday party! You SIL cannot deny him celebrating on his actual birthday, your DH could say as much "it's my birthday, yours is in two weeks". 😁

Bloody hell

StaunchMomma · 18/10/2024 18:46

Stuff like this makes me glad to be an only child.

It's all very petty, no?

3hrMax · 18/10/2024 18:46

I feel as though this is one where, if the sexes were reversed, the results/responses would be too.

3hrMax · 18/10/2024 18:50

WiddlinDiddlin · 18/10/2024 18:17

I'd be curious to know the backstory, it may make alllllll the difference here.

If she is the 'golden child' and knows it will upset him, it isn't simply an accident that she can't celebrate any other day (and lets be honest if two weeks early is ok then two weeks later is also ok giving her a whole MONTH to pick from)...
If there is a long history of her needs/wants/desires involving him losing out..

Then no, he may not be simply being a fanny or being over sensitive, its entirely possible she is being a massive cow.

Or not. Without those details its impossible to say.

I do suspect if a woman posted her brothers birthday was being celebrated two weeks early, on her birthday... the comments would be rather different.

Absolutely.

And if she wanted her brother there, it's mind blowing to me that SIL wouldn't first check if he had plans for his actual birthday.

She is either extremely thoughtless or deliberately playing games.

purplebeansprouts · 18/10/2024 18:50

AutumnLeaves24 · 18/10/2024 17:34

How???
unless at least one of them is adopted.

Edited

Ah I see you edited your response once you realised why what I'd said wasn't a silly question

SilverChampagne · 18/10/2024 18:51

3hrMax · 18/10/2024 18:46

I feel as though this is one where, if the sexes were reversed, the results/responses would be too.

I doubt it. Any middle aged woman pissed off that her brother was having a party on her birthday would be met with equal derision.

purplebeansprouts · 18/10/2024 18:51

pictoosh · 18/10/2024 17:34

Twins?

Can twins be born 2 weeks apart?

RawBloomers · 18/10/2024 18:55

I think it’s unreasonable of your DH to be annoyed at his sister for having her party then. But reasonable to not go and do something for his own birthday instead.

Whenwillitgetwarm · 18/10/2024 18:57

Your DH is behaving like a massive baby. If he’s so set on marking the birthday on the actual day, can’t he have a lunch with you and his mates during the day?

He sounds spoilt.

SilverChampagne · 18/10/2024 18:57

WiddlinDiddlin · 18/10/2024 18:17

I'd be curious to know the backstory, it may make alllllll the difference here.

If she is the 'golden child' and knows it will upset him, it isn't simply an accident that she can't celebrate any other day (and lets be honest if two weeks early is ok then two weeks later is also ok giving her a whole MONTH to pick from)...
If there is a long history of her needs/wants/desires involving him losing out..

Then no, he may not be simply being a fanny or being over sensitive, its entirely possible she is being a massive cow.

Or not. Without those details its impossible to say.

I do suspect if a woman posted her brothers birthday was being celebrated two weeks early, on her birthday... the comments would be rather different.

If she’s a massive cow and they don’t get on, he just doesn’t attend her party and organises an event of his own.
Like the adult he is. Who would even care? He doesn’t need his Mummy and Daddy at his (48th?) birthday party.
It’s all so incredibly juvenile.

RawBloomers · 18/10/2024 18:57

purplebeansprouts · 18/10/2024 18:51

Can twins be born 2 weeks apart?

Yes. but it’s exceptionally rare.

Cherrysoup · 18/10/2024 18:59

What’s wrong with the other Saturday between his birthday and hers? Why does it have to be his birthday? Bit obnoxious of her.

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