Start Your Week on Monday

Yes, Europe, you're right: It is silly that our week starts on a Sunday. Sorry. That's just the way we do it. America! But you can fix it so your week starts on a Monday, like a proper calendar should.

Click on your avatar in the upper right corner, and select the  Personal Settingsoption.

From your personal info page, under  First day of the week, use the drop-down arrow to select Monday instead of Sunday. (Or you can choose Thursday, if you're a rebel.)

Note: This will just affect the date picker you use for events and to-dos. It will not affect other accounts you're on, so if you have multiple Basecamp accounts, you'll need to select this option in each account.