Daylight Saving started this morning. I lost an hour and spent last night staring at my phone until almost midnight, screen full-bright, wondering why I couldn’t sleep.

Quick answer: Android Night Light is a built-in blue light filter that shifts your screen toward warmer amber tones in the evening. To turn it on: open Settings, tap Display, tap Night Light, tap Schedule, select Turns on from sunset to sunrise. It’s off by default and buried inside Display, a menu most people open only to adjust wallpaper or brightness.

What’s happening

You’re lying in bed and your eyes feel wired even though you’re tired. That’s the screen. Phone displays emit blue light, the kind that keeps your brain in daytime mode, and a systematic review of blue light research confirms the effect on sleep quality and melatonin suppression. Apps like f.lux have offered filters for this on desktops for over a decade. Your phone has the same thing built in. It’s just turned off.

Android calls it Night Light. It shifts your screen to warmer tones — less blue, more amber. You can set it to activate at sunset automatically.

How to turn it on

Open Settings
Tap Display
Tap Night Light
Tap Schedule
Select Turns on from sunset to sunrise

You can also adjust the intensity: slide it warmer for the full amber effect, or keep it subtle.

Why you’ve never seen it

It’s in Display, which sounds obvious. But most people open that menu to change wallpaper or brightness. They scroll right past Night Light. There’s no prompt at 11 PM suggesting you turn it on. If your screen is still too bright even with Night Light on, Extra Dim drops brightness below the minimum.

The bigger picture

Your phone has settings designed to help you sleep better. They’re buried under menus nobody explores. That’s why we built TrueTo. One place for the settings that actually help.

Spring forward. Get some sleep.