Bells and breaks

Can I set the number of lessons per day?

How to rename the periods and specify bell times

How can we specify the Long Breaks/Recess times?

How can I print breaks between lessons?

All double lessons can be over certain break

Certain longer lessons can be over all breaks

We have different bells on some days.

We have different recess times in parts of school. How to input it? (Solution 2)

We have different recess times in parts of school. How to input it? (Solution1)

Do not print some breaks or periods in some classes (or teachers or in summary timetables)

Modifying the time format

We have 6 lessons each day but on Friday we have only 4

What is 0th period (zero period)?

Can I remove 0. lesson? We are starting with 1. lesson.

Périodes d´une demi-heure

Lesson's length counting in teacher's contract

Periods of varying lengths + subjects in minutes per week (Canada)