Meridian

A native Windows desktop calendar and task manager powered by Google Calendar and Google Tasks.

Built with WinUI 3 (.NET 10, Windows App SDK), runs unpackaged on Windows 10/11.

Features

• Day and week views with timed event grid
• Google Tasks alongside calendar events
• Multi-account Google sign-in
• All-day events and task chips in the week view

Requirements

• Windows 10 1903 (build 18362) or later
• Visual Studio 2022 with Windows App SDK workload

Setup

1. Create a Google Cloud project and enable the Calendar and Tasks APIs
2. Download OAuth 2.0 client credentials as client_secret.json and place it next to Calendar.sln
3. Open Calendar.sln in Visual Studio 2022
4. Build and run

On first launch you will be prompted to sign in with your Google account. Tokens are stored in %APPDATA%\Meridian\tokens\.

Build

dotnet build -r win-x64