Casio Collection Watch - 37mm - Silver

It is water-resistant for daily use (splashes), but should not be submerged or worn while swimming or showering.

Yes, the auto-calendar function displays the day of the week and the date on the screen.

While in timekeeping mode, pressing the start/stop button typically toggles the format.

Yes, the metal sliding clasp is fully adjustable to fit various wrist sizes without needing to remove links.

The case is crafted from high-quality resin finished with a silver coating to provide a metallic aesthetic while keeping the watch lightweight.

The battery is likely depleted. Replace with a compatible CR battery at a professional watch repair shop.

Ensure you are not in stopwatch mode. Press the mode button until the time display (hours/minutes) is shown.

Check if the buttons are jammed with debris; gently clean around the edges of the pushers with a soft brush.