Calendar Features

Display events with their custom colors from google calendar, not just the default calendar color

Add a weather widget that shows the current day or 5 day forecast to the left side of the screen. If list of calendars is too long, it could possibly be a scrollable list.

Ability to change the entire app's color

PLEASE I'm not as young as the rest of you!

It would always be visible and let you know when the next event is ("in X minutes/hours/...") and what the event it.