Google Calendar displays days and months by default, but not the week number. This setting, although native, remains buried in the settings and its behavior varies depending on the platform used: web browser, Android app, or iOS app. Activating it takes less than a minute on a computer, but the procedure differs significantly on mobile, and certain specific cases may block the display without apparent explanation.
Differences in settings between web, Android, and iOS
The week number in Google Calendar is not configured the same way depending on the platform. Before following a single tutorial, it’s better to identify the discrepancies between platforms.
Further reading : How to Easily Activate the Front Fog Lights on Your Clio 5: Step-by-Step Guide
| Platform | Access to setting | Type of control | Particularity |
|---|---|---|---|
| Web (calendar.google.com) | Settings > General > Display options | Dedicated checkbox | Works regardless of the active view |
| Android (app) | Settings > General > Week numbers | Switch in settings | May be hidden if the active view is not “Week” or “Schedule” |
| iOS (app) | No dedicated switch in the app | Depends on the language/region of the account | No equivalent granularity to Android or web |
On the web, the setting is the most accessible and reliable. On Android, since the Material You redesign, the option may disappear depending on the selected view. On iOS, Google still hasn’t integrated a standalone switch by 2025: the display depends on the regional setting of the Google account, not a button in the app.
For anyone using Google Calendar on multiple devices, the procedure on the browser remains the reference. It also allows you to add the week number in Google Calendar while configuring the alternating even and odd weeks, which covers a frequent need in shared custody or professional planning.
Read also : How to Choose a Robot to Easily Make Your Homemade Nut Butters
Activate the week number on Google Calendar web
The web version of Google Calendar offers the most direct path. Here are the concrete steps.
- Open calendar.google.com in a browser and log into the relevant Google account.
- Click on the gear icon in the top right, then select “Settings”.
- In the sidebar menu, stay on “General”, then scroll down to the “Display options” section.
- Check the box “Show week numbers in the side view”.
- Close the settings page: the change applies immediately, without restarting.
The numbers then appear in the left column of the mini calendar. They remain visible regardless of the chosen view (day, week, month, or schedule).
Check the numbering standard applied
Google Calendar follows the ISO 8601 standard for week numbering, which means that week 1 is the one that contains the first Thursday of January. This detail has a concrete impact: depending on the years, January 1 can fall in week 52 or 53 of the previous year.
A thread on the subreddit r/ISO8601 documented a discrepancy between the web version and the Android version of Google Calendar, related to the regional setting of the account. If the account is set to a region that starts the week on Sunday (like the United States), the displayed week numbers may differ by one unit from the European standard.
To avoid this discrepancy, check in Settings > General that the field “The week starts on” is set to “Monday”.
Configure the week number on Android
On the Android app, the setting exists but has become more capricious since the Material You update.
Open the Google Calendar app, tap the hamburger menu (three horizontal lines in the top left), then scroll down to “Settings”. Select “General”. The “Week numbers” option should appear as a switch.
When the option is missing
Some users do not see the switch in the settings. This behavior, documented on the Google Calendar help forum in 2024, occurs when the default view of the app is set to “Day” or “Month”. The solution is to temporarily switch the view to “Week” or “Schedule”, then reopen the settings. The option then reappears in the “General” section.
Once activated, it remains functional even if the view is later switched back to “Month” or “Day”. The bug is only at the display level of the setting, not its functionality.
Limitations on iOS and in Google Workspace
Two situations deserve special attention because they are beyond the user’s direct control.
iOS: a setting absent from the app
On iPhone and iPad, Google Calendar does not offer a dedicated switch for week numbers. The display depends exclusively on the language and region setting of the Google account, not the app itself. Several responses from Google Community Specialists on the official forum have confirmed this limitation since late 2023.
In practice, an account configured in French (France) displays week numbers according to the ISO standard. An account in English (United States) may not display them at all, or show a shifted numbering. For an iOS user, the lever of action is therefore in the Google account settings (myaccount.google.com > Personal info > Language and region), not in the Calendar app.
Workspace: no domain-wide deployment
For organizations using Google Workspace, the administrator cannot enforce the display of week numbers for all members of the domain. The updated Workspace documentation in 2024 specifies that the admin manages time zones, default calendars, and regional settings, but enabling the week number column remains an individual setting per user.
This means that a team leader cannot ensure that all their collaborators see the same week number in their calendar. The only workaround is to disseminate an internal procedure and ask each user to activate the setting manually.
Synchronization between devices and pitfalls to avoid
The week number setting is not synchronized between platforms. Activating the option on the web does not automatically activate it on Android, and vice versa. Each platform must be configured separately.
Three points of vigilance regularly come up in user feedback:
- The setting “The week starts on” must be identical across all platforms to avoid a numbering discrepancy.
- On Android, updating the app may reset the setting: check after each major update.
- On iOS, changing the account’s region may take several hours before reflecting in the Calendar app.
The week number in Google Calendar is a simple setting on the web, more erratic on mobile. The web version remains the fastest and most predictable method. On Android, the trap of the default view hiding the option is the most common issue. On iOS, as long as Google does not add a dedicated switch, the regional setting of the account remains the only lever available.