Tools · Keepsakes
Time Capsule Letter Planner: What to Write and When to Open It
Free time capsule letter planner. Enter your child's birth date to get the calendar dates for letters opened at 5, 10, 13, 18, and 21 — plus real writing prompts for each age.
Enter a birth date to see the exact calendar date each letter would be opened — or leave it blank to read the prompts on their own.
Why the prompts change so much by age
A letter for a five-year-old and a letter for an eighteen-year-old aren't the same letter with a different date stapled on. A five-year-old wants proof they were loved exactly as they were, in words simple enough to be read back to them out loud. An eighteen-year-old, on their way out the door, wants something closer to honesty than comfort — a real mistake you made, a real fear you're choosing to let go of anyway. The prompts below are written for what each age is actually ready to hear, not as generic filler with a number swapped in.
Frequently Asked Questions
Why these specific ages — 5, 10, 13, 18, 21?
They mark real shifts in what a child can understand and what they need to hear. Five is young enough that a letter is mostly about being loved and remembered exactly as they are right now. Ten and thirteen bracket the identity-forming, friendship-heavy years before adolescence properly lands. Eighteen is the leaving-home letter — advice they might actually use. Twenty-one is adult-to-adult, often the first letter that reads like it's from a parent talking to a peer rather than to a child. None of this is a rule — add or drop ages freely.
What if my child never gets married, or I don't want to assume that?
Swap it for whatever milestone actually fits — moving into their first home, the birth of their own child, a graduation, a divorce recovery, coming out, or simply "the day you feel most like an adult." The point of a date-less letter is that it waits for a moment you can't predict the calendar date of, not that the moment has to be a wedding.
Should I write these all now, or one at a time as each age arrives?
Either works. Writing them all now captures how you feel about your child at every age from a single vantage point — useful, but it means the 18-year-old letter is written by someone who's only ever known a toddler. Writing each one closer to when it's sealed lets you reflect on the actual years that just passed. Many parents do a mix: draft everything roughly now, then revisit and rewrite each letter in the year or two before it's due.
Can I add a voice recording instead of just text?
Yes, and it's worth doing if you can — a recorded voice carries things a page of text can't: how you actually sound, laugh, or pause. MiloSnap's time capsule letters support a voice recording alongside the written letter, locked until the date you choose.
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Write It in MiloSnap, Sealed Until the Right Day
MiloSnap's time capsule letters lock until the exact date you choose — years or decades away — with an optional voice recording alongside the words. Part of MiloSnap's memory journal, milestone photos, auto-built albums, and WHO growth charts, not a photo editor.