How do I work out how many years an anniversary is?

Count the number of complete years between the original date and today. The anniversary that is coming up is one more than the number of complete years that have already passed, so ten complete years means your eleventh anniversary is next.

How many days until my next anniversary?

Take the day and month of your original date and find the next time it falls on or after today. The number of days between today and that date is your countdown. This calculator does that for you and also shows the total number of days since the original date.

Does it work for weddings, relationships and work anniversaries?

Yes. The calculator works for any recurring anniversary, whether it is a wedding, the day you met, a work start date, a birthday or the anniversary of buying a house. Just enter the original date and it counts the years and the days to the next one.

Anniversary Calculator

This anniversary calculator tells you how long it has been since a date that matters to you, and counts down to the next time it comes round. Enter the original date, a wedding, the day you got together, a work start date, the day you moved into your home, or any milestone, and the calculator shows the number of complete years since then, the date of your next anniversary, and exactly how many days you have to wait for it. It is the easy way to answer the questions that come up every year: how many years has it been, which anniversary is coming next, and how long until we celebrate. The tool counts complete years, so it shows the anniversary you have already reached rather than rounding up early, and it works out the next anniversary as the next time the same day and month fall on or after today. It also adds up the total number of days since the original date, which is a fun figure for a big milestone or a card. Because it uses the New Zealand date for today, the countdown is always current for wherever you are in the country. Use it to plan a celebration, book something in advance, remember the date on a card, or simply satisfy your curiosity about how far you have come. Change the date to compare different milestones, and read the results update straight away.

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Original date

11 years

complete years since your special date

Next anniversary20 June 2027

Days until then321 days

Days since your date4,062 days

Complete years are counted, so the figure is the anniversary you have already reached. The next anniversary is the next time the same day and month fall on or after today's New Zealand date.

How it works

The calculator counts the number of complete years between your original date and today. If this year's anniversary has already passed, the next one falls next year; if it is still to come, it is later this year. The days until then is simply the number of days between today and that next anniversary date, and the total days since is the full count of days from your original date to today. Because the anniversary that is coming up is always one more than the complete years already behind you, ten full years means your eleventh anniversary is next.

Worked example

Say your original date is 20 June 2015. As of today's New Zealand date that is 11 years of complete years, which means your 12th anniversary is the next one to celebrate. That next anniversary lands on 20 June 2027, which is 321 days away, and in total 4,062 days have passed since the original date. Change the date above to see the same breakdown for any milestone.

Related calculators

Age Calculator: years, months and days old.
Age in Days Calculator: total days between two dates.
Countdown to Date Calculator: days remaining to any date.
Week Number Calculator: the ISO week for a date.

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