Samsung hasn’t quite used the curves of the Galaxy S6 edge and S6 edge+ displays as much as some users would like, but they do come with a few nice features most other smartphones don’t have. One of those is Night Clock, which displays a clock on the curved edge that’s easy to see in the night.

Here’s how you can enable it.

1. Open up the Settings app on your S6 edge
2. Tap “Edge screen”
3. Tap “Night clock”
4. Active the Night Clock feature, then set start and end times

The Night Clock will now activate automatically at the start time, and deactivate at the end time — so you don’t ever have to worry about turning it on an off manually. And because your S6 edge has an AMOLED display, which requires no power when displaying black images, it burns no battery, either.