Sudoku Calendar

A dated puzzle waits on every page of the year. In Sudoku Calendar, progress moves through the calendar itself, with one Sudoku tied to each day and new months locked until the current month is finished. A solved date unlocks the next one on the calendar. The layout stays consistent with a 9x9 grid and 81 cells. Menu options include language settings, music and sound switches, plus board color choices.

How to play?

Place digits into the empty cells until the grid is full. Repeated numbers can't appear in the same row, the same column, or within any 3x3 box. A wrong number shows up in red. A correct placement lights up with stars.