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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Arguing with sister in law over DS age

175 replies

Janedoe95 · 07/09/2022 17:04

Please do correct me if I’m wrong -

my DS is 6 months born on the 10th

I work out his age by weeks at the moment so 24 weeks = 6 months

but she says he’s not 6 months as it’s not the 10th yet?

am I the only one who calculates age like this? It aligns with his vaccinations and nurses haven’t said I’m wrong.

obviously I understand when he’s older every year on the 10th will be his birthday but from what I understand it’s calculated weekly as babies can change so much and grow so fast

OP posts:
mountainsunsets · 07/09/2022 19:09

Dibbydoos · 07/09/2022 19:02

Why is OP.being unreasonable?

OP, your method is more accurate.

No it's not 😂

A year is 12 months - 52 weeks.
Six months is therefore 26 weeks, not 24 weeks.

littlepeas · 07/09/2022 19:10

6 months is 26 weeks (52/2 = 26 weeks).

And also - who gives a shit?

CheshireCat1 · 07/09/2022 19:10

Does it really matter, it’s irrelevant.

Choconut · 07/09/2022 19:13

Your sister sounds very pedantic even if she is technically correct. I can't imagine telling someone who says their child is six months that they're wrong and their child isn't 6 months old for another week or two - because who cares that much?

worriedatthistime · 07/09/2022 19:17

It really doesn't even matter

surreygirl1987 · 07/09/2022 19:18

Well obviously your SIL is right... he's not 6 months old yet. There aren't exactly 4 weeks in a month (that would make every month 28 days old). You do understand this, surely?

mam0918 · 07/09/2022 19:27

we are on the 7th even if he turns 6 months on the 10th its 3 bloody days away, talk about being penickity.

Round up hes 6 months.

Mummyoflittledragon · 07/09/2022 19:27

Your ds is 26 weeks. Tomorrow is the start of the 27th week. You’ve miscounted. On that basis, he’s 6 months old.

ijustcouldntthinkofausername · 07/09/2022 19:28

I go by the date
My son was born on 16th so on the 16th of every month he is a month older in my eyes.
If someone asked me how old he is I would say 'he'll be 6 months on the 16th' I wouldn't say he's 24 weeks old

But each to their own

Holly60 · 07/09/2022 19:30

MeridasMum · 07/09/2022 17:07

24 weeks and 6 months are different lengths of time. Close but not the same.
He is not 6 months old until 10th of the month

This.

I'm with your SIL.

Pixie2015 · 07/09/2022 19:40

Doesn’t matter all just roughly for immunisations after 12 weeks just count months

FinallyHere · 07/09/2022 19:42

Is having the energy to argue about this a good sign that everything is going well ?

Testina · 07/09/2022 19:46

You’re wrong. Because maths.

catandcoffee · 07/09/2022 19:50

No update from OP ?

Confusion101 · 07/09/2022 19:52

Here vaccinations are at 2 months. In some doctors surgeries they will not vaccinate the child if they are 8 weeks old, you are made wait until they are 2 months which goes by the date they were born. People have gotten sent home for booking them on the 8 week mark, instead of 2 months. So OP you are wrong.

nutellachurro · 07/09/2022 19:59

Yabu

You don't seem to understand how the passage of time works

24 weeks isn't 6 months

Janedoe95 · 07/09/2022 20:04

PantyMcPantFace · 07/09/2022 18:06

Why are you even having a discussion about it?

To answer your question we weren’t I just posted a photo online just saying “6 months” and she messaged DH saying why have I posted that I’m wrong.

but oh well I’m wrong no big deal

OP posts:
LakieLady · 07/09/2022 20:04

SheeWeee · 07/09/2022 17:59

How can a person know that there are 52 weeks in a year but still think that 6 months is 24 weeks?

The same people who think that if their rent is £100pw, they have to pay £400 every month.

After 3 months, they're £100 in arrears.

IDidntKnowItWasAParty · 07/09/2022 20:04

You can say 24 weeks, but not 6 months - as a month is not 4 weeks and it's not the 10th yet. Sheesh.

SproutsAtChristmas · 07/09/2022 20:05

MeridasMum · 07/09/2022 17:07

24 weeks and 6 months are different lengths of time. Close but not the same.
He is not 6 months old until 10th of the month

This.

Looneytune253 · 07/09/2022 20:07

She's right if you want to use months. There aren't 4 weeks in a month so that will never work long term

LynetteScavo · 07/09/2022 20:09

One month and four weeks are not the same thing. There are not four weeks in a month (except February).

You can't say a baby who is 48 weeks old is 12 months old.

How many months is a 42 week pregnancy? Grin

Isthatyourname · 07/09/2022 20:11

I’ve seen this discussed before and it still gives me an unnecessary rage! 4 weeks is NOT 1 month. MONTHLY is the same date every month. So 10th April = 1 month, 10th June 3 months etc
Also I have too much spare time but I can’t work out when your baby was born if on 10th March they would be 26 weeks tomorrow / 6 months in a few days unless that was just a random date example 😂

I don’t know why it bugs me but no it isn’t actually a big deal you can count how you like 🙂

Isthatyourname · 07/09/2022 20:14

Janedoe95 · 07/09/2022 20:04

To answer your question we weren’t I just posted a photo online just saying “6 months” and she messaged DH saying why have I posted that I’m wrong.

but oh well I’m wrong no big deal

😂😂 I know I had a little rant above but I’m shocked she would have the front to message your DH to correct you on your own child’s age lol

BeardieWeirdie · 07/09/2022 20:16

I had this conversation with a highly educated friend. She kept asking why I hadn’t started BLW when my baby was, according to her, 6 months old. I said that she was 24 weeks and had another 2 weeks to go, but she was adamant that 24 weeks is 6 months. It’s bloody not!!

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