New timetable (change of lesson length and number)

Hello,
In September our timetable is going to change from 9x35 min lessons to 6x55 min lessons. I was wondering if I could start building it up now without affecting this year's planner?
Thank you
Em

Yes, you can create a new calendar for next year and configure the new periods. You will have to edit the start/end times of those periods because the suggested times won't match.

The time lines shown in the schedule should remain untouched until next September. They do not affect the planner or calendar but if you change them now they won't be of much use until next year.

Before doing any of these changes a quickbackup is advised

Thank you, will back up beforehand!
Em