Relationship Milestones Worth Celebrating, from 100 Days to 10,000
By The Couples Website team · Updated · 5 min read
The short answer
The relationship milestones worth celebrating include 1 month, 100 days (about 3 months and a week), 6 months, 1 year, 500 days, 1,000 days (about 2 years and 9 months), 5 years, 2,000 days and 10,000 days (over 27 years). To count yours, pick a start date, decide whether day one counts, and subtract it from today.
In short
- Day counts like 100, 500 and 1,000 days fall on ordinary weekdays, which makes them easy to turn into surprises.
- Pick one start date and decide whether it counts as day one, so every milestone lines up.
- Leap years shift things: 365 days and one year land on different dates when a February 29 falls in between.
- Mark each milestone with something that uses the number, like 100 reasons for 100 days.
Relationship milestones aren't only anniversaries. Day counts like 100 days, 500 days and 1,000 days together arrive quietly, often on an ordinary weekday, and that's exactly what makes them fun to notice. Below is a table of the milestones worth celebrating, how long each one really is and an idea for each, followed by how to count your own days without getting it wrong.
Relationship milestones worth celebrating
| Milestone | How long that is | An idea for it |
|---|---|---|
| 1 month | 28 to 31 days | A short note and the first photo you ever took together |
| 100 days | About 3 months and 1 week | A jar of reasons, one for each day so far |
| 6 months | 181 to 184 days | A timeline of your first half year, in photos |
| 365 days | The same day as your anniversary, or one day before it if a February 29 falls in between | Celebrate twice: a small surprise on day 365, the real dinner on the anniversary |
| 1 year | 365 or 366 days | The star map of the night you met, with a letter about the year |
| 10,000 hours | About 1 year and 7 weeks | A live counter, so they can watch the hours keep climbing |
| 500 days | About 1 year, 4 months and 2 weeks | Recreate your first date: same place, same order |
| 1,000,000 minutes | About 694 days, just under 2 years | Breakfast in bed and a coupon for the next million |
| 2 years | 730 or 731 days | A map of every place you've been together |
| 1,000 days | About 2 years and 9 months | Open when letters for the next thousand |
| 1,111 days | About 3 years and 2 weeks | Make a wish together at 11:11 that night |
| 5 years | 1,826 or 1,827 days | A letter to the two people you were on day one |
| 2,000 days | About 5 and a half years | A quiz: which of you remembers more of the 2,000? |
| 3,000 days | About 8 and a quarter years | A memory game with one photo from every year |
| 10 years | 3,652 or 3,653 days | Your song, a voice message and a plan for the next ten |
| 5,000 days | About 13 years and 8 months | An advent calendar for the days leading up to it |
| 10,000 days | A little over 27 years and 4 months | A timeline of 30 moments you choose together, then a party |
You don't need to mark every one. Pick the ones that suit you: some couples love the round numbers, others only care about the classic anniversaries. The odd ones, like 1,111 days or a million minutes, are best for a small, playful surprise rather than a big plan.
How to count your days together
Counting sounds simple until you try it. Three decisions make it reliable:
- Pick your day one. Your first date, your first kiss or the day you made it official. Choose together if you can. Some couples keep two counts, which is fine as long as you know which one you're celebrating.
- Decide whether day one counts. If you call your first date day 1, your 100th day lands one day earlier than “100 days after your first date.” Neither is wrong. Just stay consistent.
- Remember leap years. Any stretch that includes a February 29 has an extra day, which is why 365 days and one year don't always fall on the same date.
For the actual math, any online date calculator gives you the number of days between two dates in seconds. In a spreadsheet, type your start date in one cell and today's date in another, then subtract the first from the second. Or skip the math and let a live counter do it for you, by the second.
A worked example
Say your first date was January 1, 2025. Counting that evening as day 1, your 100th day together was April 10, 2025, your 500th was May 15, 2026, and your 1,000th will be September 27, 2027. If you count 100 days after January 1 instead, each of those dates moves one day later.
Why day counts are worth celebrating
Anniversaries are on everyone's calendar, including your aunt's. Day counts belong to the two of you. Your 1,000th day might fall on a rainy Tuesday in a busy month, and that's the charm: nobody expects a celebration on a rainy Tuesday. A small surprise on a date they didn't see coming shows you're paying attention, without needing a reservation.
Ideas for 100 days together
At 100 days things are still new, so keep it light and specific.
- Write 100 reasons, or even 20 good ones, in a jar they tap to open one at a time.
- Make a small timeline of your first dates, from the nervous one to the one where you stopped being nervous.
- Screenshot the first message you sent each other and present it like a museum piece.
- Plan date number 101 and announce it with a countdown.
- Cook the meal from your first night in, even if it was frozen pizza.
Ideas for 1,000 days together
A thousand days is long enough to have history and plenty of inside jokes. Lean into both.
- Map every place you've been, from the first café to the trip that went sideways.
- Write a quiz about your first thousand days, with a funny message for a low score.
- Record a voice message telling the story of how you met, the way you'd tell it at a party.
- Choose 30 moments for a timeline, roughly one for each month you've had.
- Write open when letters for the next thousand: when you miss me, when we move, when we disagree.
Milestones that don't come with a number
Some of the moments couples remember most never show up as a count:
- The first trip, and the first time you got lost together.
- Meeting each other's families.
- The first holiday you spent together.
- The first fight you actually resolved.
- Getting a key to each other's place, or moving in.
- The first time one of you was sick and the other one stayed.
- Adopting a pet, or a plant you both swore to keep alive.
These make good entries for an Our story timeline, which holds up to 30 moments like instant photos on a string. Add each one as it happens and the page grows with you.
What a milestone page costs
Building a page and watching the live preview is free, with no account. To publish it with your own link, Plus is $4.99 a month, and you can cancel anytime. The page stays yours to edit, so you can update it for every milestone after this one instead of starting over, and the live counter keeps counting on its own. If the next milestone is a big one, add a countdown so you can both watch it get closer.
Questions people ask
When is 100 days in a relationship?
About three months and one week after your start date. If you count your first day as day one, the 100th day is one day earlier than 100 days after it. A date calculator or a spreadsheet gives you the exact date in seconds.
How long is 1,000 days together?
A little under two years and nine months. It falls on a different date for every couple, often in the middle of a normal week, which makes it a fun surprise, because your partner probably isn't counting.
Which day should we count from?
Whatever feels like the beginning to both of you: your first date, your first kiss or the day you made it official. Some couples keep two counts. The important thing is to choose one and stick with it so your milestones line up.
How do I count how many days we've been together?
Subtract your start date from today's date with a date calculator or a spreadsheet, and remember that any February 29 in between adds a day. A live counter on a Couples Website page does it for you, by the second.
What's a good gift for a relationship milestone?
Something that uses the milestone itself: a jar of 100 reasons for 100 days, a timeline of your first 1,000 days, a star map of the night you met for your first year. Pair it with a short letter and a plan for the next one.
Make their page tonight
Free to build and preview. Plus is €4.99 a month when you send it, cancel anytime.