Dayhaps is a free online calendar platform where users can manage and share their personal and business calendar with others. Beside that you can follow public calendars on your own calendar with one click. All Haps (events) of public calendars become visible in the calendar of the users and when anything changes in one of the public calendars all followers get notified. Dayhaps is therefore very useful for example for families, sports clubs, theatres, bars and schools.