I agree with the colouring, and if we’re fielding gripes with the calendar, I have a few. For context, I pretty much exclusively use the month view in calendar applications on my phone.

• I prefer scrolling to swiping when moving around month to month, give me a toggle
• the day cells could do with being smaller, allowing eight weeks visible up from current six
• tapping a day cell could open a lower third panel summarizing the event times and titles or a floating tooltip on the cell doing the same, instead of the current action which enters the day view which I find the largest way to display the information
• when an event is opened, I should be able to copy it and set a new date; it is so useful for recurring appointments with irregular recurrence to not have to type a hundred words over again
• speaking of copying, I don’t want to copy an address into a navigation application, let me tap the address on the event and open it in whatever default is set on my device
• I use a widget to display upcoming events for certain calendars, and with Proton having only a single option with zero customisation, it shows four events where my primary calendar typically shows twelve in the same space

I could keep going, but this is already much longer than this post haha.

If you’re interested, my primary is Business Calendar. I’m trying to switch away as the only sync option is through Google. Unfortunately, it has proven too functional so far and remains.