And kanji with manga
Sunday, March 12, 2017

Japanese Date Format

Perhaps the biggest problem globalization has faced until now is this simple problem: how to write a date. In British English you'd write 12 of March of 2017, or 12/03/2017. Day, month and year. In American English that'd be March 12th, 2017, or 03/12/2017. Month, day and year. But what about Japanese? What's the date format used in Japan?

Rejoice, my fellow human! For it's one of the those unicorn-level-rare times that the Japanese language way actually makes more sense than the western languages way!

The Japanese date format is year, month, day, or 2017年3月12日 (ni sen jyuu nana nen, san gatsu, jyuu ni nichi), literally "year 2017, month 3, day 12."

Comparison showing the difference between the Japanese date format, the British date format and the American date format.

For partial dates, dates without years, it's just month and day. For example:
  • jyuu-gatsu san-jyuu-ichi-nichi 10月31日
    Month 10, day 31 (Halloween)
  • jyuu-ni-gatsu ni-jyuu-go-nichi 12月25日
    Month 12, day 25. (Christmas)

Since months, days and years in Japanese are just counters, all you need to know are the numbers in Japanese and you'll be able to read and write any date.

Years may also be written with Japanese imperial calendar years instead of Gregorian years. heisei jyuu nana nen, san gatsu, jyuu ni nichi 平成29年3月12日.

Because of this order, the "date" in Japanese may be called nengappi 年月日, literally "year, month, day." A given "date," the date of something, is also often called hidsuke 日付. Another common word is seinengappi 生年月日, which means "birth date." Note this isn't used the same way as tanjoubi 誕生日, which is a person's "birthday."

Why Japanese Dates Make More Sense

Now, I'm pretty sure you got curious when I said the Japanese date format make more sense than our western date formats. After all, Japan? Making sense? In their chaotic Japanese language where nothing ever makes sense nonetheless?! What is this madness?!

But I'm not joking. The International Organization for Standardization, the people who create standards the whole world uses so stuff like the internet works alright, had drafted decades ago the famous ISO 8601 standard, which aimed to standardize date formats.

In this international standard, dates are written like this: 2017-03-12, YYYY-MM-DD, four digit year, two digit month, two digit day, which is just like Japanese (except it isn't required to use 2 digit months and days).

Why The Year First?

The year first makes more sense because the biggest, that is, the most significant component should come first. Think of the number 123. The digit 1 is smaller than 2, but because 1 comes before 2 in 123 the 1 (hundred) is the bigger number.
  • 2017-03-12 (biggest, big, small)
  • 18:35 (hour is big, minute is small)
  • 5' 10" (feet big, inches small)


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  1. Why is it "May" though? Shouldn't it be "March" ?

    1. Oh, wow. You're right. I can't believe I didn't notice this until now! They both start with M so sometimes I mistake one for the other.

      Thanks, I have replaced the image.

  2. I am wondering would you mind letting me know what this date would be in Japanese? 6th October 2018

  3. Yep, quite logical. Though in Russia we use reverse order ( However we use more logical address format: country/region/city/street/house№/flat№. Like narrowing the search zone everytime )

  4. september, october, november, december. In latin, septem = 7, octo = 8, novem = 9, and decem = 10. Therefore september obviously is the 7th month, october is the 8th month... Oh, wait. It isn't. But in Japanese 九月 (kugatsu) literally translates to ninemonth, 十月 (juugatsu) to tenmonth, etc. Whenever I have to write the date in numbers somewhere I have to count which month is which. In Japanese there are no month names. Just like we have no names for each of the 31 days in a month they have no names for each months themselves. I like that way more.
    (At the time of speaking it is 2019-07-29. I can easily tell it is shichigatsu. But I have no clue which month it is in my own language..