In Zurich on a Sunday, here are some great things to do:

• Visit museums that are open on Sundays such as the Swiss National Museum, Kunsthaus, Museum Rietberg, WOW Museum, FIFA Museum, Natural History Museum, and the Ethnographic Museum (the last two are free).
• Explore the Zurich Zoo or take a hike in the nearby wildlife park in Langenberg to see local wildlife like European bison, bears, wolves, and deer.
• Enjoy a Sunday brunch at popular spots such as Babus, Roots, Felix Café, Café Elena, or the Dolder Grand for a luxury experience with oysters and champagne.
• Take a hike in Uetliberg or Zürichberg for beautiful views of Zurich, forests, and mountains.
• Visit historic churches like Grossmünster, Fraumünster (famous for Chagall windows), and St. Peter’s Church in the old town.
• Stroll along the banks of Lake Zurich on the lakeside boulevard for a peaceful walk.
• Check out the botanical gardens of the University of Zurich, which are free and filled with diverse plant life.
• In summer, swim in Lake Zurich or in pools along the Limmat river like at Obere and Untere Letten.
• Have a barbecue in one of Zurich’s many parks that have grill spots.
• Walk across the Rathausbrücke bridge where a vegetable and flower market is often held on Sundays.
• Explore Zurich’s old town Altstadt with its colorful narrow streets and many points of interest.
• Take a boat cruise on Lake Zurich or enjoy the city views from the Polybahn funicular and the Polyterrasse viewpoint.
• Relax and people-watch at Bellevue & Sechseläutenplatz, a lively plaza in front of Zurich’s opera house.

These activities offer a blend of outdoor enjoyment, cultural experiences, and local lifestyle to make the most of a Sunday in Zurich. The city tends to be quiet on Sundays with many shops closed, but it is perfect for family time, nature, and exploring art and history. If you want more specific events for this Sunday in Zurich, checking local event calendars closer to the date might also uncover special happenings. This gives a good variety of choices depending on your interests and the weather!