Age Calculator & Anniversary Counter
Enter your date of birth to get your exact age (years, months, days), traditional Japanese “kazoedoshi” age, Chinese zodiac animal, star sign, days since birth, and Japanese school grade all at once. The anniversary tab counts the days until or since any date and shows milestone anniversaries.
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ABOUT
About Age Calculator & Anniversary Counter
The Age Calculator & Anniversary Counter shows your exact age (years, months, days), traditional Japanese age (kazoedoshi), Chinese zodiac animal, star sign, weekday of birth, total days since birth, and Japanese school grade from just your date of birth. Change the reference date to see “how old was I on that day”, and use the anniversary tab to see days until or since any date and milestones like 1,000 or 10,000 days in a calendar.
How to use Age Calculator & Anniversary Counter
- 1Enter your date of birth
- 2See your exact age, traditional age, zodiac animal, star sign, weekday of birth, total days, and school grade
- 3Change the “reference date” to see your age on that date
- 4On the anniversary tab, check the days until any date and milestones such as 1,000 or 10,000 days
- 5Copy the share URL to send someone the page with the same dates filled in
Great for
- Check your exact age as of a given date for a CV or application form
- Find your traditional Japanese age for events such as Shichi-Go-San or kanreki
- Record your child’s school grade or how many days old they are
- Count the days until a wedding anniversary, work anniversary, or your favorite idol’s debut day
- Plan ahead for milestones like 1,000 days together or a 10th wedding anniversary
Good to know
- Calculations use the date in Japan Standard Time (JST).
- Your exact age goes up by one on your birthday.
- Traditional age (kazoedoshi) is calculated as “this year − birth year + 1”.
- School grades follow the common Japanese cut-off: people born from April 2 to April 1 of the following year are in the same grade.
- The dates you enter are calculated only in your browser and never sent to a server.
Questions this tool answers
Use Age Calculator & Anniversary Counter for searches like these:
- know exactly how old I am today
- my exact age as of a date for a CV
- my traditional Japanese age (kazoedoshi)
- count how many days I have been alive
- days until our wedding anniversary
- when our 1,000th day together is
FAQ
- Can I check my age on a past or future date?
- Yes. Change the “reference date” and your exact age, traditional age, and school grade are recalculated for that day. Enter the date of a document submission or ceremony to see your age on that day.
- What is the difference between traditional age and exact age?
- Exact age goes up by one each birthday and is what is commonly used in Japan today. Traditional age (kazoedoshi) counts you as 1 at birth and adds a year every New Year’s Day; it is used for events such as Shichi-Go-San and unlucky years (yakudoshi). This tool shows both at the same time.
- Can I find out when my 10,000th day is?
- Yes. The anniversary calendar below the results shows totals like 100, 1,000, and 10,000 days and milestone dates such as 10th and 20th anniversaries. Milestones that have passed are shown in gray.
- Can I share my results?
- Yes. Copy the share URL at the bottom of the page to get a link that opens the page with the same dates. The dates are only passed in the URL and are not stored on a server.
Special Thanks