If you're looking to Download DayNight on your Chromebook laptop Then read the following guideline.

DayNight is designed to help the blind and visually impaired with day and night awareness by scheduling notifications at sunrise and sunset. Simply navigate through the setup steps so DayNight knows your location and has access to send you notifications. Once complete 1 month of notifications will be scheduled and can be disabled anytime within the app. Feel free to reach out for improvements via Twitter @ay8s.