Date format reference
Japan Date Format
The common numeric date format in Japan is YYYY/MM/DD.
Date Time Encyclopedia answer, with calculation details and assumptions below.
Year-first dates are common in Japanese numeric usage. For example, Monday, July 27, 2026 can be written as 2026/7/27 in the ja-JP locale.
Snapshot
Japan Date Format
The common numeric date format in Japan is YYYY/MM/DD.
Year-first dates are common in Japanese numeric usage. For example, Monday, July 27, 2026 can be written as 2026/7/27 in the ja-JP locale.
- Country
- Japan
- Common pattern
- YYYY/MM/DD
- Locale example
- 2026/7/27
- Locale code
- ja-JP
Method
Country pages summarize common everyday numeric date order and show a locale-formatted example using Intl date formatting.
Avoiding date ambiguity
Japan Date Format is useful when a numeric date could be read in more than one order. Month-first and day-first formats can conflict in international communication.
Compare country formats
Country format pages show common local patterns and examples so ambiguous dates can be rewritten more clearly.
Related Lookups
FAQ
What is the common date format in Japan?
The common numeric date pattern shown here is YYYY/MM/DD.
Can official or formal formats differ?
Yes. Government, standards, and ISO contexts may use stricter formats such as YYYY-MM-DD.