Daypilot is Open source ?
There are two editions of DayPilot:
1. DayPilot Lite (Open-Source) - available under Apache License 2.0
DayPilot Lite for ASP.NET: http://www.daypilot.org/daypilot-lite/
DayPilot Lite for MVC: http://mvc.daypilot.org/lite/
DayPilot.Modal is also open-source:
2. DayPilot Pro (commercial)
This is a paid version with additional features.
You can check the availability of individual features in the documentation:
There is an "Availability" table at the bottom of each feature page where you can check the editions.
thank you very much for answering :)