Week Number Dashboard

I work by week numbers. My team plans by week numbers. Yet I could never find a week number extension that felt complete, so I built my own. Week Number Dashboard is designed for people who plan, schedule, and organize their work around calendar weeks. FEATURES Accurate ISO 8601 week numbers • Correct ISO 8601 week calculations • Matches Google Calendar, Outlook, Microsoft Project, Jira, and other ISO-compliant tools • Correct handling of year boundaries A complete week dashboard • Current calendar week • Week date range • Live week progress • Countdown until the next week • Current date and time Browseable calendar • View week numbers directly in the calendar • Navigate any month • Jump instantly to any week and year • Quickly find the dates for any calendar week Customization • Multiple color themes • Light and dark mode • Adjustable popup width • Show or hide dashboard sections BUILT WITH CLAUDE This extension was built from scratch in collaboration with Claude. Every feature—from the ISO week calculations to the calendar interface—was designed and refined through many iterations with the goal of creating a polished, practical tool for people who work by week numbers. PRIVACY Week Number Dashboard is completely free. • No ads • No tracking • No analytics • No accounts Your preferences are stored using Chrome Sync so they're available across your signed-in Chrome browsers.