Confluenceページの更新日について

[桑島政人]

ページ上部にある最新更新日が以下のようになっております。

なお、この状態は複数のページで起きております。

最終更新日: 2025/25/29

これを例えば、2025/07/29　というような正常な表示にするためには

どうしたらよろしいかを教えていただけると助かります。

以上、よろしくお願いいたします。

[Tomislav Tobijas]

Hi @桑島政人 ,

As Mia said, can you check General configuration page under app settings? You should be able to see Date format option there. For configuring time and date formats, read more here.
You could also use a direct link to access this page, where URL looks like this (just replace <sitename>): https://<sitename>.atlassian.net/wiki/admin/configuration

Now, one more thing worth mentioning is the user's account preference, which may cause different time and date formats in some apps. Each user can set their own language and region by configuring it here https://id.atlassian.com/manage-profile/account-preferences, where the language option is related to the date formats you see (although I'm not sure if updated value is impacted here). 👀

Anyway, if you believe you've configured everything correctly, you could also share some screenshots so we could try helping with it.

Cheers,
Tobi

[Mia Tamm _Simpleasyty_]

こんにちは @桑島政人！👋

This looks like a Confluence Cloud date formatting issue, not something you’ve done wrong.

By default, Confluence displays the “Last updated” timestamp in the site’s global language/locale settings.
If your site is set to English (United States) → it will use the US format (YYYY/MM/DD).

However, the strange value you mentioned — 2025/25/29 — suggests that the “month” field is incorrectly being printed as the day, which is likely a bug in the UI layer.

You can check the current date format by going to:

Administration → General configuration → Languages
and verify if the default locale is “English (US)” or “Japanese”.

Atlassian normally expects:

• English (US) → 2025/07/29
• Japanese → 2025年07月29日

If the locale is already correct but the month and day are clearly flipped, I’d recommend opening a support ticket with Atlassian — looks like a rendering bug on their side rather than something configurable by the user.

— Mia Tamm from Simpleasyty

[桑島政人]

このように日本語に設定になっています。

システム側のバグなのかどうかを引き続きご確認をお願いします。

[Mia Tamm _Simpleasyty_]

Hi @桑島政人 thank you again for confirming your site is set to Japanese. That clarity helps narrow down the issue significantly.

How Confluence chooses the date format

Confluence primarily uses the browser’s locale setting, not the global site locale, to determine how dates are formatted.

Even though you've set the site to Japanese, if your browser is configured to something else (like US English), Confluence may default to that for display, which could result in swapped or odd date patterns.

Known bug in Japanese locale

What you described — a weird date like 2025/25/29, where the month is showing as the day — indeed aligns with known i18n bugs affecting languages like Japanese. In particular:

• A known issue in Jira and related Atlassian tools has caused the month field to render incorrectly in some languages like Japanese.
  
  

• Additionally, older versions of Confluence had inconsistencies where date formatting respected the browser locale, not user or site settings—though some of these have been addressed in newer server versions.

What to do next

1. Double-check your browser language setting first — ensure it’s set to Japanese (ja-JP) as well as your Confluence site.

2. If the problem persists even when both browser and site are in Japanese, then this is likely a rendering bug on the Atlassian side.

3. In that case, I recommend opening a support ticket with Atlassian, including:

   • A screenshot showing the incorrect date format (2025/25/29).

   • Your browser locale and Confluence locale settings.

   • Mention that this resembles a known issue with date formatting in Japanese (as referenced in Atlassian’s i18n backlog).

They’ll need that info to reproduce, confirm the bug, and potentially prioritize a fix.

I’m confident this isn’t something broken in your setup — it looks like an Atlassian UI rendering issue. Let me know if you'd like help drafting the support request!

— Mia Tamm from Simpleasyty