How can I display or convert CW (calendar week) format into a timeline in Jira Plans?

Jam Evoc

Hi everyone 👋

We’re using Jira Advanced Roadmaps (Plans), and most of our internal scheduling is based on CW format (calendar week numbers like CW41, CW42).

Our product timelines, milestones, and sprint cadences are defined in CWs, but Jira Plans only works with calendar dates (DD/MM/YYYY).

Is there any way to:

• Display CW numbers directly on the timeline, or
• Automatically convert CW inputs (e.g., CW41) into actual date ranges?

Ideally, we want to keep our roadmap fully aligned with our CW-based planning method.

Has anyone tried any automation, script, or creative workaround for this?

Thanks in advance! 🙌

Ali Umut Terzi

Hi @Jam Evoc  👋

That’s an excellent question — many teams in Europe and manufacturing environments plan based on CW (calendar week),
but Jira Advanced Roadmaps doesn’t natively display or convert CW values on the timeline.
Still, there are several ways (including one creative twist 😉) to make it work effectively.

Howewer; If you switch your timeline to the weekly view, hover your mouse over any week header — Jira will show the ISO week number as a tooltip.

If that’s not enough, you can consider the following options.

🧩 Option 1 — Custom Field + Automation (Official approach)

Create a custom text field named “Calendar Week”, then use a Jira Automation rule to populate it automatically:

Field: Calendar Week Value: {{issue.Start date.format("ww")}}

This formula extracts the ISO week number (CW) directly from your Start date.
You can apply the same logic for Target start or Target end fields as well.

🧠 Option 2 — Label or Filter View

If you just want to group issues by week, you can manually add labels such as CW41 or CW42
and then use filters or swimlanes (e.g. labels = CW41) in your board or plan.
This approach keeps your team’s roadmap visually organized by calendar weeks.

🧩 Option 3 — Tampermonkey Script (Browser Extension 🚀)

If you want CW numbers to appear directly on the Jira Plans timeline,
you can use a lightweight Tampermonkey script to overlay week labels on your browser.

📎 Also note: Atlassian has an open feature request related to this — you can officially follow and vote for it here:

👉 JRACLOUD-92517 – Display ISO Week Numbers in Jira Cloud

Hope this helps! 🙂