18th birthday messages: wording from parents, godparents and grandparents

Most 18th birthday messages end with “wishing you health, happiness and every success”. There's nothing wrong with it, but the birthday boy or girl will hear it twenty times that day and forget it by the evening. What they remember is the one sentence in which they recognise themselves.

A simple formula works: name → specific detail → wish. The detail is the thing nobody else could write — that at six they sold pebbles outside the house, that they're the only one in the family who can parallel park, that they taught you a phone game you still don't understand. Then tie the wish to that detail, not to a vague “success in life”.

The second thing is length. Two sentences are enough for a gift tag; a letter can run to a page. If you want to write something long, write it as a letter and put only a short version on the card — squeezing a whole letter in tiny handwriting onto an A6 card does nobody any favours.

One more trap: lines like “now it's all down to you” and “time to start acting responsibly”. An eighteen-year-old hears them as a telling-off. You can wish someone well in adult life without lecturing them.

If you're not sure about the tone, read the message out loud. If you wince or blush at the false grandeur, they'll notice too. A message that sounds like you is always better than one that sounds like it came from a calendar.

Parents can allow themselves the most feeling — but it's still good to leave room for humour. The examples work for a daughter or a son; just swap the details.

Godparents have the advantage of a little distance: they can be part rebel, part adviser. It's worth reminding them that you've been there from the very start, since the christening.

Grandparents are the only ones who hold the perspective of two generations. The wording can be as old-fashioned as you like — grandchildren expect it from you, and they love it.

Humour works when it's about them, not about drinking or getting old. These suit siblings, aunts, uncles and family friends.

The most common mistake is bringing up problems. “Just make sure you pass your A levels” may be well meant, but on the day of the party it sounds like a check-up. The same goes for comments about weight, looks, a boyfriend or girlfriend, or who they “should have been”.

The second mistake is projecting your own hopes onto them: “I hope you study medicine like your dad”. Eighteen is the age when people are only just choosing, and a wish that narrows their options in advance isn't a gift.

The third is jokes about drinking. Eighteenth birthdays and alcohol often go together, but on a message from parents or grandparents — one they might keep — it ages badly. Leave those jokes to their friends.

And finally: don't promise anything in the message that you won't keep (“I'll never tell you what to do again”). An eighteen-year-old will remember it more precisely than you will.

A gift tag usually ends up in the bin along with the wrapping paper. If you want your message to last, write it somewhere it can still be found in ten years.

The simplest option is a dedication in a book — on the front endpaper of a book they'll keep at home. Some parents reach for nostalgia at 18: a personalised book in which they're the hero, drawn from a childhood photo, can carry your message as a printed dedication on the first page (the ebook costs £5.99, the printed edition £24.99). We go through how to write that kind of dedication in Book dedications: what to write and common mistakes. Another option is a longer letter, which could even go into a time capsule — if you started one with your child years ago, their 18th is the natural day to open it.

If the message comes with money, add one sentence to the envelope about what it might be for. How to make sure the envelope gets more than a quick “thanks” is covered in How to give money so it doesn't vanish in a weekend. And if you're still looking for the present itself, you'll find ideas in 18th birthday gifts for your son.

In England and Wales, 18 is the age of majority: you become a legal adult, can sign contracts in your own name and are responsible for them. It's also the age at which you can vote in a UK general election.

That's good material for your message, too. Instead of a vague “adulthood”, you can pick up on something concrete: their first vote, their first contract in their own name, passing their driving test, their first trip without you. A message that names a real new freedom sounds more grown-up than one that just repeats the number 18.