Shade non-working hours for Google Calendar is a free Chrome add-on developed by Madeleine Smith Software. This add-on allows you to "grey-out" your non-working hours in the day, week, and 4-day views of Google Calendar. With this extension, you can easily see which hours of your day are blocked off for work and non-work time.

To use the add-on, simply click into the extension and set your personal working hours. This feature allows you to customize the add-on according to your specific schedule and preferences.

It's important to note that Shade non-working hours for Google Calendar is not affiliated with Google or the Google Calendar brand. It provides a convenient way to visually distinguish between your working and non-working hours, enhancing your productivity and time management.