to not want a big thing to celebrate my significant birthday?

[A580Hojas]

I have a birthday ending in 0 later this year.

My dh, children, family and friends want some sort of celebration.

I do not.

How do I get my wishes heard without offending anyone?

It's not that I'm unhappy about getting older. It's not that I'm an introvert (exactly the opposite actually).

It's just that I don't want a fuss!!

Can you not take control and plan what you DO want?

e.g. birthday brunch with dh and dc; then picnic with parents / siblings (everyone brings their own). Graciously let someone bring a cake.

Friends? Enjoy individual meet-ups, or small groups of close friends. Stretch it out over weeks / months. Take it slow. Make each interaction meaningful and fun.

Don't do anything you don't want to. But importantly, don't leave space for a 'surprise' party!

Just tell them! If they ignore you, then refuse to cooperate. Celebrating adults' birthdays is always excruciating, and there is no good reason why one with a 0 on should be any more significant.
If they insist on "treating" you, could you ask them to treat you to something you could do on your own, like a theatre ticket?

If they organise something knowing its not what you want, politely decline to go. If they all descend on you, go for a walk/out until they leave. It's your birthday, your feelings matter most.