JavaScript Event Calendar for Resource Scheduling

In this article, we build a simple HTML5 event calendar web application. The client-side (HTML5/JavaScript) part is universal. We use sample PHP and ASP.NET Core backends. This article looks at changing calendar date using a date picker (on left side), drag and drop event creating, moving and resizing, changing look in a single click using a CSS theme, PHP backend, and ASP.NET Core backend (REST API).