The period of your life when you are no longer young but are not yet old.

To not make as much progress as someone else.

The condition of not having adequate duration and/or quality of sleep to support decent alertness, performance, and health.

You and your friends (and families, if possible) promise that every evening at 7pm or a time you've all agreed, everyone will switch off their devices and do something else.

Make something happen

To end or finish sth gradually.