Business days
Working days, counted properly.
Count the working days between any two dates, weekends skipped, and add or subtract days from a date. Use it on the dashboard or open its page on its own.
Make it yours
This widget is already on the board above. Use Add widget to put more beside it, drag the cards to swap them, and the whole set saves to this browser — no account, no database, nothing to log in to. Add a second card and this page quietly becomes your dashboard, board and all.
Every widget here is free and needs no API key. Where a widget cannot work where you are, it says so rather than showing a guess.