How to write a birthday letter to your child, every year
Short answer. A birthday letter to your child works best as one page with five parts: the date and their age, what happened this year, who they are right now, one memory from the year, and one hope for the next. Use the same structure every year, so the letters are easy to write and easy to compare later. Below are prompts for each age from the first birthday to 21. Keep every letter in one place, private until you choose to share it. In Dear Moment you can keep each letter just for you and share it with your child when they are older.
What to write in a birthday letter
The same five parts work for a letter to your daughter on her birthday and a letter to your son on his birthday, at 1 or at 21.
- The date and their age. "Today you are 6." Add where you are writing it.
- What happened this year. Three or four facts: a new school, a move, a new sibling, something they learned to do.
- Who they are right now. What they eat, play, watch and say. Use their exact words.
- One memory from the year. One scene, with the details: where you were, what they said, what happened next.
- One hope for the next year. Keep it small and real: something to try, a place to go, a thing to do together.
Sign it with the name they call you. About one page, or 200 to 400 words, is enough. Specific details matter more than big statements, because the details are what they will not remember themselves.
An example at age 6 (written for this guide, not a real letter). Dear Maya, today you are 6. I'm writing this at the kitchen table while you're at school. This year you started school, lost your first tooth, and learned to ride your bike without help on the path by the river. Right now you eat cucumber with every meal, you want to be a vet, and you ask for the same bedtime story every night. My favourite day this year was in August, when you swam a width of the pool and shouted "Did you see?" before you had touched the side. Next year I'd like us to finish the big jigsaw on the shelf. Love, Mum.
Prompts for the first birthday
This letter is for later. They won't understand it now, so write it for them to read at 10 or 18. For letters in the first weeks and months, see the letters section of our baby journal prompts.
- What did a normal day look like this year, from waking up to bedtime?
- What were their first foods, words and sounds, and what did they think of each?
- Who visited, and who held them first?
- How did the first birthday go, and what did they do with the cake?
Prompts for ages 2 to 4
Read a short version aloud on the day. Keep the full letter for later.
- What new words did they say this year? Write them how they said them.
- What were they scared of, and what did they love?
- What questions did they ask you again and again?
- What did they insist on doing by themselves?
Prompts for ages 5 to 9
They can hear the letter now, and from about 7 they can read it. Read it together at breakfast or bedtime.
- Who were their friends this year, and what did they play?
- What did they learn at school that surprised them, or you?
- What did they make, build or draw that they were proud of?
- What was a hard day this year, and how did they get through it?
Prompts for ages 10 to 12
They may want to read it alone. Give it to them, or keep it if this year was hard.
- What were they into this year that you didn't understand at first?
- What did they do for someone else without being asked?
- What changed in how they talk to you?
- What is something they can do now that they couldn't do at 7?
Prompts for ages 13 to 15
These are often the hardest letters to write, and a teenager may not want to read one yet. Write it anyway and keep it for later.
- What did they stand up for this year?
- What did they teach you, about their phone, music or anything else?
- What made them laugh this year, even on bad days?
- What do you notice about them that they don't know you notice?
What not to write to a teenager. Leave out things they told you in confidence, crushes, comments on their weight or looks, and comparisons with brothers, sisters or cousins. Don't use the letter to list what worries you. Write about what they did and who they are.
A letter for their 16th birthday
At 16 they are close to leaving home, and they can read a more honest letter. Ask them whether they want to read it now or keep it for later.
- What did they take on this year without being asked: a job, a cause, a responsibility?
- What decision did they make this year that you agreed with, or didn't?
- What would you like to do together before they leave home?
A letter for their 18th birthday
The 18th birthday letter is often longer, and it is a good time to give them all the letters from earlier years.
- What family stories haven't they heard yet?
- What practical things do you want them to know: money, work, asking for help?
- What do you remember about the day they first went to school, and what do you see now?
- What can they always call you about, at any time?
Handing over the set. If you have kept letters for 18 years, give them together, with this year's on top. Tell them they can read the letters in any order and at any time. They can read them all at once or keep some for later.
A letter for their 21st birthday
Give this one on the day. At 21 the letter is to an adult, so it can be more direct about what you have seen them do.
- What changed between 18 and 21?
- What have you learned from watching them as an adult?
- What would you like to hear about from them, if they want to tell you?
For a son or daughter who is already grown, at 30 or 40, keep the same five parts and keep it short. Write about their year, not about their childhood.
Read it now, or keep it for later?
Decide for each letter. Under about 8, read it aloud on the day, because they like hearing about themselves. Between 8 and 12, ask them. From 13, keep the letter unless they ask for it. A letter about a hard year, such as an illness or a divorce, is usually for later. You can also do both: read a short version on the day and keep the full letter.
If you missed a year, or are starting late
Start with this birthday. For the years you missed, write one short catch-up letter. Go through your photos from those years one month at a time, and write what you remember: "At 4 you called every dog Biscuit." Give it the date of that birthday. In Dear Moment you can backdate a moment, so a catch-up letter appears at the right point on the timeline.
The first letter can also come before the birth. A letter written during the pregnancy is a good start to the set: what you were doing to get ready, what you were wondering about them. Dear Moment works during pregnancy, so you can start before the baby arrives.
Keep the letters together, and private
- Keep them in one place. Letters in drawers, email drafts and old phones are hard to find after 18 years. If you handwrite them, take a photo of each page.
- Record yourself reading it. A voice note of you reading the letter keeps your voice as well as your words. Our guide to birthday interview questions covers recording your child's side of the birthday.
- Don't post the full letter publicly. Birthday letters hold a lot of detail: their school, their friends' names, health and worries. Share a line if you want to, and keep the rest in the family.
- Ask before you share. From about age 10, ask your child before you show a letter to anyone else, including family.
- Let others add a note. The other parent, or a grandparent, can write a few lines each year. Keep them with your letter.
Where Dear Moment fits
Write the letter as a note in Dear Moment, or add photos of a handwritten one, and add a voice note of you reading it. Voice notes are transcribed for you. You choose who sees each moment, so a letter can stay just for you until you decide to share it, for example on their 18th birthday. Shared moments open through a private link in a browser, with no app or account. You browse memories by month, so each year's letter sits in their birthday month. Nothing is posted publicly, there are no ads, data is stored in the EU, and your memories are never used to train AI. For more on keeping family photos and notes private, see our guide to a private family photo album.
Dear Sofia, you are five today. This year you learned to swim without armbands, and you decided that peas are fine after all. You still sing in the bath, and you know every word of three songs.
Questions
What do I write in a letter to my daughter on her birthday?
Write her age and the date, a few things that happened this year, what she is like right now, one memory from the year, and one thing you hope for next year. Use her own words where you can. One page is enough.
What do I write in a letter to my son on his birthday?
The same five parts: his age and the date, what happened this year, who he is now, one memory, and one hope for next year. Write about what he did and said, not only how you feel. The details are what he will want to read later.
How long should a birthday letter be?
About one page, or 200 to 400 words. Keep it short so you can write one every year. Milestone birthdays, such as 18, can be longer.
When should I give my child the letters?
Under about 8, read the letter aloud on the day. From about 13, many parents keep the letters and give the whole set at 18 or 21. You can also do both: read a short version now and keep the full letter for later.
Should I handwrite a birthday letter or type it?
Either works. If you handwrite it, take a photo of each page so there is a copy.
What if I missed a year?
Write this year's letter as normal. For the years you missed, write one short catch-up letter using the photos from those years, and give it the date of that birthday.
Can I write the first letter before my baby is born?
Yes. A letter written during the pregnancy can be the first one in the set. Write what you were doing to get ready, and what you were wondering about them.
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