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Original poster

Do you know someone who shares a birthday with their sibling? (Not twins!)

209 replies

Midnightpony · 19/06/2023 23:13

Just wondering.
A friend of mine was born on her brother's birthday.
Another friend has her DC X number of years and one week apart (not quite the same!)

I wonder how common the exact same birthday is

OP posts:
TheGriffle · 20/06/2023 07:58

My DH was born on his sisters 3rd birthday. MIL did her party then as soon as it had finished grabbed her bag and headed off to the hospital!

My daughters are born 3 years 360 days apart (one on the 20th of the month the other the 25th of the same month)

MrsElijahMikaelson1 · 20/06/2023 07:59

A friend’s DD and friends’s sister has a DD then 2 yrs later a DS all on the same day-she went into Labour at the girls joint birthday party!

MadisonAvenue · 20/06/2023 08:04

My grandmother and her sister were born on the same day, 7 years apart. Our oldest son was also born on that date.

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Events & celebrations
LT2 · 20/06/2023 08:11

Yes. Although the second child was born via c-section. They chose the same date as the first child!

SpringIntoChaos · 20/06/2023 08:17

No, but my friend has twins born on different days (which I'm sure isn't that uncommon, but I've never known any before where this is the case).

They were born naturally, several hours apart, one around 10pm on 'one day' and the other in the early hours of the morning the following day. It's quite nice for them I think, as whilst twins, they do have this separate identity too, and have two separate birthday parties each year.

mastertomsmum · 20/06/2023 08:18

In the DHs family there are 4 siblings. He and his bro have birthdays quite close together. His bro shares a birthday with the youngest SILs husband and one of their daughters also has same birthday.

My bro was much older than me but our birthdays were only 3 days apart.

My favourite one is that my husband and my nephew share a birthday and birth place. They were both born in a hospital in a town that their parents were only living in for a short time making it even more coincidental.

Perry13579 · 20/06/2023 08:29

I can think of four sets of siblings I know with birthdays 0-4 days apart.

massivesalads · 20/06/2023 08:40

I don't but my son was born on 25th feb and I'm due on the 26th!!!

Really hoping to go a few days overdue so I'm not in hospital/recovering on his birthday.

Tinytigertail · 20/06/2023 08:42

Yes, two different friends both have siblings that share a birthday but are not twins

Original poster
Midnightpony · 20/06/2023 09:04

shadowchancesassy · 19/06/2023 23:20

Yes I have a friend with boys sharing a birthday and they are 3 years apart. I also know a son,dad,and grandad that all share a birthday and all have the same name.

Wow what are the chances! So cool!

OP posts:
Carryonkeepinggoing · 20/06/2023 09:09

How common is this? About a 1/365 chance of this happening, with a 2 sibling family I would say. Then if a third sibling is born into a family with 2 children with different birthdays the odds would be doubled and so on.
I mean it’s not quite that simple a calculation because some people can choose when they get pregnant fairly easily and want to avoid conceiving in certain months etc etc but on a population level I would expect it to more or less even out.

NoCoincidence · 20/06/2023 09:13

SpringIntoChaos · 20/06/2023 08:17

No, but my friend has twins born on different days (which I'm sure isn't that uncommon, but I've never known any before where this is the case).

They were born naturally, several hours apart, one around 10pm on 'one day' and the other in the early hours of the morning the following day. It's quite nice for them I think, as whilst twins, they do have this separate identity too, and have two separate birthday parties each year.

I went to school with twins whose birthday not only put them on different days- but different year groups!

They were identical twins but the second one got stuck and wasn't born until September 1st after her sister managed to escape the day before. Their mother had a huge fight to enable them to go to school in the same year group.

wineandsun · 20/06/2023 09:13

My mum and her sister. Old and youngest of 7 children, with 15 years in between.

NoCoincidence · 20/06/2023 09:14

Carryonkeepinggoing · 20/06/2023 09:09

How common is this? About a 1/365 chance of this happening, with a 2 sibling family I would say. Then if a third sibling is born into a family with 2 children with different birthdays the odds would be doubled and so on.
I mean it’s not quite that simple a calculation because some people can choose when they get pregnant fairly easily and want to avoid conceiving in certain months etc etc but on a population level I would expect it to more or less even out.

It's far more likely than that, in cases like mine and others mentioned above the conception took place on a specific occasion- Christmas, Valentine's Day, anniversary, Birthday etc.

shieldmaiden7 · 20/06/2023 09:18

I knew someone who had 4 children and they scared 2 birth dates. Thankfully there was a good 10 plus years between the two that shared which made parties etc easier.

My eldest DD is the day after my brother.
My youngest DD is the day after her aunty.
My DH is the day after his mum.
My exdh is the same day as his dad.
And I'm due 2 days before my youngest DD now so we will see.

Original poster
Midnightpony · 20/06/2023 09:18

LittleBumblebee3 · 19/06/2023 23:32

Me + 2 siblings born 2 years and 1 week apart. Oldest to youngest born 14th/21st/28th of the same month but in 1988/1990/1992.

I now have a DS born on DHs birthday. And DH was born on his dads birthday 😅

@LittleBumblebee3 you could be the family@shadowchancesassy mentioned!!

OP posts:
LBOCS2 · 20/06/2023 09:21

My uncle's first daughter was born on his 40th birthday. His second was born on his 43rd.

All three of them share a birthday, I imagine it's quite an expensive and busy month!

BernardsarenotalwaysSaints · 20/06/2023 09:23

Yes, a friend from school, she & her 2 dd's (3 year gap) share the same birthday, her husband is the next day & all 4 parents fall within that week.

Not the same but dc2(12) & dc4(8) had the same due date. Older one was prem & younger one was 10 days early though. Don't think my body was keen on the date Grin

Youngest shares my Mums birthday.

Anabella321 · 20/06/2023 09:25

My friend shares her birthday with her sister. They're 5 years apart.

greyhairnomore · 20/06/2023 09:32

Yes , two lots of siblings.

user50316 · 20/06/2023 09:36

Yes lots! And my girls are only two days apart

22WR · 20/06/2023 09:45

My children share the same birthday. It's really nice and makes the day even more special. But it is a logistical nightmare!

ChickenRat · 20/06/2023 10:10

My great grandmother, grandfather and cousin all share a birthday which is particularly easy to remember as it happens to be the date of a well known historical event

Victoria Verstappen (sister of Max, the formula one driver) had her second child the day before her first child's first birthday. I can't even imagine what that's like!

eewno · 20/06/2023 10:10

Yes I know a few! And lots of birthday sharing with parents in my family too.

mast0650 · 20/06/2023 10:20

My mother and her sister.

Clearly there is roughly a 1 in 365 chance that any two people (siblings or not) will share the same birthday.

I share the same birthday with two out of my three SILs.