How to track your pet's age and adoption day
A simple way to track your pet's age in days and celebrate their adoption anniversary, plus the milestones worth marking along the way.
Most of us know our pet’s birthday in the vague way we know a distant relative’s: somewhere in the spring, probably. But the day you brought them home is usually burned into memory, and the number of days you have shared since then is the kind of thing that sneaks up on you. A counter makes both easy to keep.
TL;DR
Set up two count-up events: one from your pet’s birth (or estimated birth) and one from the day you adopted them. Add a photo to each, drop a widget on your home screen, and let the app surface the anniversaries automatically. You get a running age in days and a “gotcha day” you will never forget.
Why track your pet’s age in days
A year is a clumsy unit for a creature that changes this fast. A puppy at eight weeks and a puppy at sixteen weeks are almost different animals, and “he’s about one” tells your vet far less than “he’s 412 days old.” Tracking in days gives you precision when it matters: medication schedules, training windows, the senior-care conversation that quietly arrives.
For rescue pets with an unknown birthday, the adoption day is often the more meaningful date anyway. It is the day their luck changed, and it doubles nicely as a yearly checkpoint for weight, vet visits, and photos.
There is also the plain sentimental case. Pets do not get the decades we do, so the days are worth counting while they are happening, not after.
Step-by-step: set up your pet’s tracker
1. Find your “Day 1” (or estimate it)
If you have papers from a breeder or shelter, use the birth date. If your pet is a rescue with no known birthday, ask your vet for an age estimate at the first visit and back-calculate, or simply use your adoption day as the anchor. An estimate you can see beats an exact date you forget.
2. Add a count-up event for age
Open Day Counter, tap the +, and choose Count up from a date. Title it with your pet’s name (“Luna’s age”) and set the birth or estimated-birth date. The number you see is now their age in days, ticking up on its own.
3. Add a second event for adoption day
Repeat the process for the day you brought them home. Call it “Gotcha day” or “Luna’s adoption.” This is the one most people care about emotionally, and because Day Counter gives you unlimited events, there is no reason to choose between the two dates.
4. Add a photo and an emoji
Each event can carry a photo and an emoji, so use a picture from the day you met. Two years later, that first-day photo next to a four-digit day count is a small, reliable way to feel something good on an ordinary Tuesday.
5. Put it on your home screen
Add the single-event widget (free) for whichever date you check most, or use a multi-event widget to show age and gotcha day side by side. Seeing the number without opening anything is what turns a tracked date into a lived one.
Milestones worth marking
You do not need a reason to celebrate, but these tend to matter:
| Milestone | Why it is worth a note |
|---|---|
| 100 days home | The settling-in period is over. Most rescues have fully decompressed by now. |
| 1 year (365 days) | The first gotcha day. A good annual anchor for a vet check and fresh photos. |
| 7 years old (dogs) | Many vets shift to senior wellness screening around here for medium and large breeds. |
| 1,000 days together | A satisfying round number that usually sneaks up with no warning. |
Set a reminder on each event so the app nudges you a few days ahead. That lead time is the difference between “oh, it was last week” and actually marking the day.
A note on senior and special-needs pets
If your pet is older or managing a condition, day-level tracking earns its keep. You can run a separate count-up from a diagnosis or a surgery date to see recovery at a glance, the same way people track a baby’s age in days, weeks, and months during the fast-changing early stretch. Keep it factual and low-pressure: the number is information, not a scoreboard. For anything medical, your vet’s guidance comes first, and the counter is just there so you arrive at appointments with accurate dates instead of guesses.
Related
- How to set up an anniversary tracker that sticks - the same approach, applied to the people (and pets) you love.
- Tracking your baby’s age in days, weeks, and months - a close cousin of pet-age tracking.
- Day Counter - set up your first event in under a minute.
FAQ
What date should I use if my pet’s birthday is unknown? Ask your vet for an age estimate at the first visit and count back from there, or just use your adoption day as the anchor. An approximate birth date is still useful, and the gotcha day is exact.
Can I track more than one pet at once? Yes. Day Counter supports unlimited events, so each pet can have its own age counter and adoption-day counter, with separate photos and reminders.
Will I lose my dates if I change phones? Not if you turn on the optional iCloud or Drive backup. Your events sync across devices, so a new phone picks up right where the old one left off.