DHTMLX Scheduler .NET provides all essential features that allow you to create rich and highly customizable event and booking calendars for ASP.NET/MVC/MVC3 Razor apps.
You can add custom tooltips if you need to display additional event details without opening the event details form. The tooltip appears when the end user puts the mouse over the event. The look of the tooltips (colors, displayed details, etc.) can be customized.