In Toggl Track it's possible to modify the starting day of the week from Monday to any other day.

To perform the change visit your Profile page and update the First Day of the Week setting. To read more about other options available on that page visit the Your Toggl Track account article.

If you still have questions about changing the first day of the week, please contact our Support team by clicking on the purple chat icon in the bottom right corner of this page to start a chat or search our knowledge base.