Bugzilla

When tackling this bug, please also read the productive exchange in closed duplicate bug 1717363.

attaching image by Thomas D. (:thomas8) from [comment #4](https://bugzilla.mozilla.org/show_bug.cgi?id=1717363#c4) of closed duplicate bug 1717363, which reads as follows:

> Created attachment 9229233 [details]
> Screenshot 1 (annotated): Happy guessing - where is the keyboard focus?? (Hint: it's neither C nor D!)
> 
> Keyboard interaction with the main calendar view is very poor - pretty much non-existent.
> 
> It is totally not clear with all the colors in the week view where the focus is.
> - Today (C in the screenshot) is over-emphasized by comparison and looks focused, but is not.
> - The focused day (B) has focus but does not look focused: it's lacking a clear blue focus border (focus is actually there, as seen when you press Ctrl+I to add an event).
> - Basic keyboard navigation from one day to another using cursor keys or page up/down is not possible.
> 
> We need to figure out some of the details, here's a start:
> - `Cursor left/right/up/down` moves focus between calendar boxes horizontally/vertically according to their layout on screen.
> - `Page up/down` changes the view to the next/previous time span per current view:
>   - next/previous day on day view
>   - next/previous week on week view
>   - next/previous screen on multiweek
>   - next/previous month on month view
> - Remove the current wrong shortcuts `[` / `]` which is inconsistent with mail view behaviour

When tackling this bug, please also read the productive exchange in closed duplicate bug 1717363.

attaching image by Thomas D. (:thomas8) from [comment #4](https://bugzilla.mozilla.org/show_bug.cgi?id=1717363#c4) of closed duplicate bug 1717363, which reads as follows:

> Created attachment 9229233 [details]
> _Screenshot 1 (annotated): Happy guessing - where is the keyboard focus?? (Hint: it's neither C nor D!)_
> 
> Keyboard interaction with the main calendar view is very poor - pretty much non-existent.
> 
> It is totally not clear with all the colors in the week view where the focus is.
> - Today (C in the screenshot) is over-emphasized by comparison and looks focused, but is not.
> - The focused day (B) has focus but does not look focused: it's lacking a clear blue focus border (focus is actually there, as seen when you press Ctrl+I to add an event).
> - Basic keyboard navigation from one day to another using cursor keys or page up/down is not possible.
> 
> We need to figure out some of the details, here's a start:
> - `Cursor left/right/up/down` moves focus between calendar boxes horizontally/vertically according to their layout on screen.
> - `Page up/down` changes the view to the next/previous time span per current view:
>   - next/previous day on day view
>   - next/previous week on week view
>   - next/previous screen on multiweek
>   - next/previous month on month view
> - Remove the current wrong shortcuts `[` / `]` which is inconsistent with mail view behaviour