These instructions don't seem to agree with how its done. Thinking they are for an older version. Enabling calendars in Thunderbird is a straightforward process. Here’s a step-by-step guide to help you out: Open Thunderbird: Launch the Thunderbird application on your computer. Access the Calendar Tab: Click on the calendar icon in the top-right corner of the Thunderbird window to switch to the Calendar view. Create a New Calendar: Right-click in the calendar list on the left side of the screen. Select New Calendar from the context menu. Choose whether you want to create the calendar on your computer (local calendar) or on the network (online calendar). Set Up the Calendar: If you choose On my computer, enter a name for your calendar, select a color, and click Create Calendar. If you choose On the Network, enter your username and the calendar URL. Thunderbird supports various calendar URLs, including Google Calendar. If you want to sync your Google Calendar with Thunderbird, you’ll need to install the Provider for Google Calendar add-on. Here’s how: Install the Add-on: Go to the Thunderbird menu (≡) and select Add-ons. Search for Provider for Google Calendar and install it. Configure the Add-on: After installation, go back to the Calendar view. Right-click in the calendar list and select New Calendar. Choose On the Network and follow the prompts to connect your Google Calendar. That should get your calendars up and running in Thunderbird! If you run into any issues, feel free to ask for more help.