Adding a school calendar
It would be great if the program offered a calendar that you can customize for your individual school (start & end dates, vacations) and will allow you to change schedules for special programs or create a coverage schedule.
There are no plans for adding calendar since there are already some great and well known calendar apps like Google Calendar, iCalendar, Outlook Calendar and similar. If exporting timetable into calendar is needed then please add it as a new idea.
Maurizio Del Bianco commented
It will be awesome to add a calendar to the timetable, this is how i consider to be the best option.
When you define Days and Periods in the owl you should put a validity start date and end date.
The program could now generate a calendar for those dates which can be used to pin single events, define bank holidays where the school is closed or to see and publish the generated timetable in a calendar view.
This should not be a gigantic effort in terms of development but a massive improvement to the product.