PHP libraries for schedules?

Question

Yii

There are 2 models: Lessons and Trainings
one-to-many relationship
Training for a lesson as an offer (variant of your product) for a product, in fact an instance. There is a lesson, and there are lessons of this lesson with start and end date fields, which in total is the schedule.
The question is - are there any solutions (did not find suitable ones) for organizing the schedule so that you can select days and times in the form of a calendar, as you like - with a grid, table ...? At least for a week
It is not necessary that the solution be flexible - intervals of an hour, half an hour can be set in the grid ... I just can’t find anything similar at all