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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

AIBU to not consider 21 a milestone birthday?

166 replies

DragonsAndDaffs · 05/06/2026 12:35

Do you consider 21 a milestone birthday?
DD is 21 soon, and many of her friends have already turned 21; none of them has had a party, and they have all just marked the birthday like any other... they all consider 18 the milestone coming-of-age birthday, and I would agree.

I'm old enough to remember my aunt turning 21 in 1969, before the voting age was lowered in 1970.

YANBU 21 is not a milestone
YABU 21 is still a milestone

OP posts:
VimesandhisCardboardBoots · 05/06/2026 15:09

DragonsAndDaffs · 05/06/2026 14:34

That's fine......I was responding to the poster who said that 21 was universally recognised as a milestone.
It's clear from this thread that opinion is split, I wonder if it's regional?
I'm in South West Wales.

Edited

South Wales here, was a big thing when I celebrated mine (21 years ago I've just realised!) and I was at DPs nieces 21st a couple of weekends ago, that was a big party (hired out a rugby club) so still a big thing amongst that age group now

Fizzybluewater · 05/06/2026 15:10

I went out on the lash with my mates for my 21st. I would have hated going out for a family meal and being centre of attention whilst everyone around the table sang happy bloody birthday to me - so cringy 🙄

Dontcallmescarface · 05/06/2026 15:10

No. I didn't do anything for mine 40 years ago and DD considered he graduation to be more important than her 21st which was 3 weeks earlier.

Bushwoolie · 05/06/2026 15:11

Definitely a milestone birthday. And has been for as long as I remember.

Many moons ago I worked for Clinton cards. Our milestones section was literally 16, 18, 21, 30 and onwards in 10s.

21 being a milestone goes back 100s years

IdentifyingAsAWoollyMammoth · 05/06/2026 15:12

I'm 52. My 18th was a big deal but aside from lots of cards saying 21 it was no different to my 20th or 22nd. None of my friends had 21st parties or made a big thing of it either. 18 was definitely regarded as the important one.

21st was more of a thing back in my parents day - key of the door and all that.

paradisecircus · 05/06/2026 15:13

Of course it is; it always has been. Obviously it's up to the individual if / how they want to celebrate.

I8toys · 05/06/2026 15:14

It was years ago - we used to get keys and things. Do they even sell them anymore? Not so much now. My son had a party but he likes parties. 18 is more of a milestone. What use is a tankard with 21 on it really?

stealthninjamum · 05/06/2026 15:16

In my area (south east) it’s always been a milestone, although not everyone chooses to celebrate it. I had a big party for my 21st in the early 90s but some of my friends didn’t want a party so I think we had a weekend away in a cotttage, somewhere like the Cotswolds.

MyDeftDuck · 05/06/2026 15:18

Both 18 and 21 are recognised as significant birthdays in my family and my AC had special gifts on those dates and DGC will all get treated the same. It’s a personal thing I guess, what suits one family won’t necessarily be a great fit for another.

DryTerryandJUNE · 05/06/2026 15:18

Traditionally it was THE milestone birthday but it isn't in the UK anymore. I went to a few fancy 21sts in the 90s/2000s but haven't heard of them being a thing since. Nowadays the milestones just seem to be 18, 40, 50, 60, 75, 80, 100. Although I'd have thought every birthday is a milestone from 80 😅

cardibach · 05/06/2026 15:24

DragonsAndDaffs · 05/06/2026 12:58

But why? Surely that changed when 18 became the mark of coming of age.

I'm in my late 50s and didn't celebrate 21 as a special birthday. I'm finding the replies very interesting.

I celebrated 18 at home because, as you say, it’s when you legally become an adult and can do more things. My parents said I could choose one of the two. However I was at university for 21 and we had a big party there, so I celebrated both as significant in different ways.
Edit: for context, I’m 61 and DD (30) did the same

LettuceAndCarrots · 05/06/2026 15:26

I'm a decade younger than you OP and 21 was very much treated as a milestone birthday by my family. As were 16 and 18 but 21 is when they were the most generous with gifts.

I didn't have a party though because a) I didn't want one and b) my closest friends were all at different unis by then. I did have a small party with 6 school friends at 18. Not because I wanted to drink though as I'm tee-total.

I don't think a party is what makes a milestone birthday or not. It's OK for some people to celebrate 21 and other people not! Why does it matter?!

Gwenhwyfar · 05/06/2026 15:28

Sunnyyetnotsunny · 05/06/2026 13:00

As non Brit, can someone explain why 21 is big milestone, please? Like to a five year old🙈

Edited

Because it used to be the age of majority. That's going back to my parents' generation though so grandparents to people turning 21 now. Time to forget it.

Gwenhwyfar · 05/06/2026 15:29

I8toys · 05/06/2026 15:14

It was years ago - we used to get keys and things. Do they even sell them anymore? Not so much now. My son had a party but he likes parties. 18 is more of a milestone. What use is a tankard with 21 on it really?

Yes, but the key was just symbolic of a key to your family home, which you'd get in reality as soon as you needed it. I never got one at any age because we had a key hidden in the garden...

SweetnsourNZ · 05/06/2026 15:34

TheKittenswithMittens · 05/06/2026 13:10

There is even a song :
She's twenty-one today
Twenty-one today
She's got the key of the door
Never been twenty-one before
Her father says she can do what she likes
So shout Hip Hip Hooray
For she's a jolly good fellow
Twenty-one today

Never heard all of the song before. We only ever sang the 1st 5 lines. It must have been from the days when daughters were considered their father's property before marriage or turning 21.

mumofoneAloneandwell · 05/06/2026 15:35

Yabu, its a huge milestone!

changedusernameforthis1 · 05/06/2026 15:35

I never thought about it before, but I turned 21 in 2012 and there was a lot of build up to it - my Mum always talked about how special it is (or was).

Needless to say I was gutted when I got a few cards and a bath set with nothing planned after all the hype! I was, however, pregnant with my first and extremely hormonal at the time.

I guess when my kids turn 21 I'll see how they feel. I'd love to go all out and celebrate it as a milestone of they want to, but won't be overly disappointed if not. I guess each to their own.

Nannyfannybanny · 05/06/2026 15:37

14c 21 was decreed age of adulthood. The song "21 today" was written in 1910, when you were middle aged, hardly relevant today. 1969, "The Family Act"lowered the age of consent,voting, being able to marry without your parents consent to 18. Some cultures celebrate a girl starting to menstruate.

MrsMitford3 · 05/06/2026 15:38

The greeting card industry obviously considers it one-

You can buy cards reading 18th, 21st, 30th etc
You know-the milestone birthdays

SweetnsourNZ · 05/06/2026 15:39

Gwenhwyfar · 05/06/2026 15:29

Yes, but the key was just symbolic of a key to your family home, which you'd get in reality as soon as you needed it. I never got one at any age because we had a key hidden in the garden...

I always thought it was a key to the world. People do still gift them to their children here in New Zealand. But probably not as much as they used to. We have some beautiful carved ones decorated with paua shells here.
We also have the yard glass tradition here but I think that's not as common now.

Monty36 · 05/06/2026 15:40

Drivingmissrangey · 05/06/2026 14:10

Isn’t that what most people chose, to celebrate either 18 or 21? My parents offered me one big party and I chose to wait for my 21st. I went to loads of 21sts so I definitely wasn’t the only one!

Not always no. Hence my post. Some celebrate both ! I agree with you though.

Beyondamountainandoverthesea · 05/06/2026 15:42

I have a 21 and 22 year old and both of their 21st Birthdays were treated as milestones. In a world of shit it was lovely to celebrate a bit harder with them both.

MrsPositivity1 · 05/06/2026 15:43

Omg yes. 21 is big milestone in family/friend groups

MaybeIamJustABitch · 05/06/2026 15:44

Whilst my two DS's (who had both left home by the time they were 21), went out with their mates from uni, I did splash rather a bit of cash on them both respectively.

Happyholidays78 · 05/06/2026 15:46

TheKittenswithMittens · 05/06/2026 13:02

21 used to be the age of maturity. The age at which one could vote, inherit property, make contracts, borrow money without a guarantor. Around 1970 it was lowered to 18.

Ahhh I see, I've always wondered why 21 was considered a special birthday. I and my family, friends etc all celebrated being 18 as you could by booze & get into the club's legally!