Hello there, @hooopteee ...
Sorry to see that your question has been sitting out here unanswered for such a long time. What you are asking for is basically an image map where when students roll over parts of an image, they can click on a date to navigate to another page in your course. I can understand why you'd want to create something like this for your students, but you should also make sure that the image is accessible, too. I searched the Community, and I found an old posting from @G_Petruzella called Basic Clickable Image Map: code-snippet. I'm not sure his code still works (assuming it still does?), so you'd have to try it out on your own before implementing it in your course.
If you have any questions about that code, I would recommend that you post the question to Gerol's link I've provided above...as I'm sure he would be happy to help.
Let Community members know if you have any other questions about this...thanks! Take care, stay safe, and be well.
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