Find out exactly how long you’ve been together, how many days you’ve shared, and when your next anniversary or relationship milestone arrives.
Use this relationship anniversary calculator to answer “how long have we been together?” Enter your first date, wedding date, or relationship start date to see your exact time together, total days as a couple, next anniversary countdown, and upcoming milestones. Dates are calculated privately in your browser.
Calculator
Results
Ready to calculate Use the controls on the left and calculate to see your result, units, and interpretation.
How Long Have We Been Together?
Some date tools measure pure elapsed time. Relationship anniversaries need more than a raw date difference. You may want the exact calendar answer in years, months, and days, a total-day count for a message or keepsake, and a countdown to the next celebration. This relationship anniversary calculator brings those views together so you can answer the practical and emotional version of the question: how long have we been together?
Enter the date that matters to you, such as your first date, wedding day, engagement date, first meeting, or another shared event. Then choose a reference date. The reference date can be today, a future trip date, an upcoming party date, or a past date you want to check. The result gives a human-friendly anniversary format and a running-total format, which is useful when planning messages, gifts, travel, photo books, or personal records.
How to Use the Relationship Anniversary Calculator
Choose whether you are tracking a dating anniversary, wedding anniversary, engagement, first meeting, or custom event.
Enter the start date for that relationship milestone.
Use today as the reference date, or enter another date to preview a future or past anniversary point.
Select calculate to see your exact time together, total days, total weeks, next anniversary, next monthsary, and milestone dates.
What the Calculator Shows
The results include the exact calendar duration, total days together, total weeks, the current anniversary year, the next yearly anniversary, the countdown to that anniversary, and a shareable text line. The milestone table also highlights common celebration dates such as 100 days, 6 months, 1 year, 1,000 days, 5 years, and 10 years.
Relationship Milestones to Celebrate
Couples often celebrate more than yearly anniversaries. This calculator can also help you find milestone dates such as 100 days together, 6 months together, 1,000 days together, and your next monthsary.
Milestone
Why couples use it
100 days together
A short-term milestone that feels meaningful early in a relationship.
6 months together
A common half-year celebration before the first yearly anniversary.
1,000 days together
A memorable total-day milestone that does not usually match a yearly anniversary.
5 years together
A major long-term relationship or wedding anniversary.
Next monthsary
The next monthly repeat of your start date.
Dating Anniversary vs Wedding Anniversary
A dating anniversary usually counts from the day a relationship began, while a wedding anniversary counts from the marriage date. Some couples track both because they represent different parts of the relationship. The anniversary type selector changes the labels in the calculator, but the date math is the same: the tool counts from the date you choose to the reference date.
What Is a Monthsary?
A monthsary is a monthly relationship milestone. If your relationship started on June 14, the monthsary usually falls on the 14th of each month. When a month is shorter than the original day, the calculator uses the closest valid date in that month.
Formula
exact duration = calendar difference decomposed into complete years, months, and days
total days = reference date − start date
next anniversary = start month/day in current year, or next year if already passed
Example Calculation
Example: if a relationship started on 2020-06-14 and the reference date is 2026-03-18, the calculator reports the exact calendar span, total days and weeks together, and how many days remain until the next June 14 anniversary.
Anniversary Gift Ideas by Year
Gift traditions are optional, but they can be a useful starting point when a milestone is coming up.
Anniversary
Traditional idea
Simple celebration idea
1 year
Paper
Letter, photo book, printed memory
5 years
Wood
Wooden keepsake, framed map
10 years
Tin or aluminum
Metal print, engraved item
25 years
Silver
Silver jewelry, framed photo
50 years
Gold
Gold-themed dinner or keepsake
FAQs
How do I calculate how long we have been together?
Enter your relationship start date and a reference date. The calculator breaks the span into complete years, months, and days, then also shows total days and weeks together.
What date should I use as our relationship start date?
Use the date that matters most to you: first date, wedding day, engagement date, first meeting, move-in date, or another shared event.
What is a monthsary?
A monthsary is a monthly relationship milestone that repeats on the same day of the month as your start date, or the nearest valid date in shorter months.
What is the difference between a relationship anniversary and a wedding anniversary?
A relationship anniversary usually counts from when the relationship began. A wedding anniversary counts from the marriage date. You can use either date in this calculator.
Does the calculator include leap years?
Yes. It uses real calendar dates, so leap years and different month lengths are included in the total-day and exact-duration calculations.
Can I calculate 100 days or 1,000 days together?
Yes. The milestone results include 100 days, 500 days, 1,000 days, 2,000 days, and longer yearly milestones.
Can I use this as a love counter?
Yes. It works as a private love counter by showing how many years, months, days, weeks, and total days have passed since your chosen start date.
Can I share the result with my partner?
Yes. Use the copy result button to copy the result text, including the share line shown in the results.
What if I only know the month and year?
The calculator needs a complete date for exact calendar math. If you are unsure, choose a meaningful approximate day and treat the result as an estimate.
Is my relationship date stored?
No. Dates are processed locally in your browser and are not uploaded to Starlight Tools.
5 Facts
1
Calendar anniversaries and total-day milestones are not the same
A 1,000-day milestone usually falls on a different date from a yearly anniversary.
Milestone tracking
2
Months vary in length
That is why exact calendar differences are more meaningful than simply dividing total days by 30.
Date math
3
Reference dates enable future planning
You can preview how long a relationship will be on an upcoming event date, not only today.
Planning
4
Week totals make long spans easier to visualize
For some users, total weeks are easier to understand than a large total-day count.
Presentation
5
Countdowns add context to milestones
Seeing both the duration so far and the days until the next anniversary gives a more complete picture.
Celebrations
Important Note
This tool is for personal date tracking and celebration planning. It does not create or interpret any legal status or official anniversary entitlement.
