Mega Sudoku Puzzle Help us solve poster-sized 9×9 Sudoku puzzles throughout the month of June! We’ll have a new puzzle each week. + Add to Google Calendar + iCal / Outlook export Date Jun 17 2025 Time All Day Location Mattoon Branch Library 311 Slate Ave, ​Mattoon, WI Phone 715-489-3333 Next Occurrence Go to occurrence page Date Jun 18 2025 Time All Day Share this event