When I open my calendar, there are three panes.
The left shows a list of calendars and some month-view calendars.
The central pane shows the current month.
The right pane shows tasks.
The central pane is always really small, so I resized it.
On restarting evolution, this pane is still really small.
It need resizing every time.
Moving this upstream. Please refer to  for further updates.