How to Enable Dark Mode Automatically at Sunset on iPhone

 Dark Mode on iPhone reduces eye strain, improves battery life on OLED screens, and provides a comfortable viewing experience in low-light environments. For U.S. and Canadian users, enabling Dark Mode automatically at sunset is the most convenient way to enjoy these benefits without manual adjustments. This OnePlus guide walks you step-by-step through the setup.

Why Enable Dark Mode Automatically

  • Reduce eye strain in the evening or in low-light settings.

  • Save battery life on iPhone models with OLED screens (iPhone X, XS, 11, 12, 13, 14, 15 series).

  • Enhance visual comfort during night-time browsing or reading.

  • Seamless transition from light to dark appearance without manual intervention.

Step 1: Open Display & Brightness Settings

  1. Open Settings → Display & Brightness.

  2. Here you’ll see options for Light and Dark appearances.

Step 2: Enable Automatic Dark Mode

  1. Toggle Automatic on.

  2. Tap Options to choose the schedule:

    • Sunset to Sunrise: iPhone uses your location to determine local sunset and sunrise times.

    • Custom Schedule: Set specific start and end times for Dark Mode.

OnePlus Tip: Using Sunset to Sunrise is ideal for U.S. users in different time zones, including EST, CST, MST, and PST, as it adjusts automatically based on your location.

Step 3: Verify Location Services

For Sunset to Sunrise to work correctly:

  1. Go to Settings → Privacy & Security → Location Services.

  2. Make sure Location Services is turned on.

  3. Scroll down to System Services → Setting Time Zone and ensure it’s enabled.

This allows Dark Mode to adjust accurately to your local sunset and sunrise times.

Step 4: Use Control Center for Quick Toggle

Even with automatic Dark Mode, you may want to toggle it manually:

  1. Swipe down from the top-right corner (iPhone X and later) to open Control Center.

  2. Tap Brightness, then tap the Dark Mode icon to enable or disable manually.

This is handy when traveling or in locations with unusual lighting.

Step 5: Combine with Night Shift

Night Shift reduces blue light for better sleep and complements Dark Mode:

  1. Settings → Display & Brightness → Night Shift.

  2. Schedule Night Shift to activate Sunset to Sunrise or custom hours.

  3. Adjust color temperature for warmer tones in the evening.

OnePlus Tip: Using Dark Mode with Night Shift is ideal for U.S. users working late or using their iPhone in dimly lit rooms.

Step 6: Test Automatic Transition

  • Wait until sunset or adjust your iPhone’s clock to verify Dark Mode activates automatically.

  • Ensure apps that support Dark Mode (Mail, Messages, Safari, third-party apps) follow the system appearance.

Related OnePlus Guides

Final Thoughts

Automatically enabling Dark Mode at sunset provides a seamless, comfortable, and energy-efficient iPhone experience for U.S. and Canadian users. By following OnePlus’ step-by-step guide — enabling Automatic mode, verifying location services, and combining with Night Shift — you can enjoy optimal screen appearance and protect your eyes during low-light conditions.

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