This method creates a dedicated, standalone window for Google Calendar that feels like a traditional desktop app. It doesn't have an address bar or tabs, and it can be pinned to your taskbar. Get started with Google Calendar - Computer

While there is no official native "Google Calendar per PC" installation file (like an .exe or .msi), you can effectively using Progressive Web App (PWA) technology or by syncing it with your computer's built-in apps. 1. How to "Download" Google Calendar via PWA (Recommended)