It sounds like a math problem, but it actually trips up a surprising number of couples: how do you count months in a relationship? If you started dating on the 15th, is your "one month" exactly 30 days later, or is it the 15th of next month? Do you count the month you started? What about partial months? Here's the simple version of how couples actually count it.
The Short Answer
Count from the calendar day you started dating, not from a "30-day chunk." If you started on June 15th, your one-month anniversary is July 15th. Two months is August 15th. And so on. This is the way most couples track months and anniversaries, and it's how every anniversary calculator (including ours) does it.
How to Count Months in a Relationship — Step by Step
- Pick your start date. The day you officially started dating, or the day you both agreed you were a couple. If it's fuzzy, pick the date that feels most meaningful to both of you.
- Add one calendar month at a time. Same day, next month. June 15 → July 15 → August 15.
- Skip the math for partial months. If today is June 25 and you started on June 15, you're "10 days into your first month" — not 0.33 of a month. People don't talk in fractions of months.
- Handle short months gracefully. If you started on January 31, your one-month is February 28 or 29 (the last day of Feb), not "March 3." Calendar months win.
Do You Count the Month You Started Dating?
No. The day you started dating is "day one of month one." You don't count it as a completed month until you reach the same calendar day the following month. So if you started on June 15, you finish your first month on July 15 — that's when you say "we've been together one month."
How Do You Count Anniversary Months?
Same way. Your "monthly anniversary" (sometimes called a "monthsary" by long-distance couples especially) is the same calendar day each month as your start date. Many couples celebrate the smaller monthly milestones in the first year, then shift to yearly anniversaries after that.
Common Milestones Couples Track
- 1 month, 3 months, 6 months — the early months feel huge.
- 100 days — popular in Korea, Japan, and increasingly worldwide.
- 1 year — the first big one.
- 500 days, 520 days — 520 sounds like "I love you" in Mandarin (wǒ ài nǐ).
- 1000 days — a quiet but meaningful one.
- Every yearly anniversary after that.
Want the full list of milestones — including the random ones nobody told you about? Check our guide to relationship milestones.
The Lazy Way: Just Use a Calculator
If you'd rather not count manually, our free anniversary calculator does it for you — total days, weeks, months, years, and every upcoming milestone. Free, instant, no signup. And inside the OurCouple app, your anniversaries get tracked automatically and remind you both before each one — so you never miss a 100-day or a 1000-day again.
Quick Recap
- Count by calendar day, not 30-day blocks.
- Same day, next month = 1 month.
- Don't count the day you started as "month one complete."
- For short months (Feb), use the last day of the month.
That's it. Now go celebrate the next one.
