A clock seems like a poor choice for an e-ink display. It's going to update once a minute or whatever interval you pick. A calendar will only update when your

A clock seems like a poor choice for an e-ink display. It's going to update once a minute or whatever interval you pick. A calendar will only update when your calendar events pass, which at least for my usage tends to be limited to 30 minute intervals and generally only a few times a day.