The Great Prominent flies in one generation from April to July.
The larvae feed especially on oak trees.
It is a common species in most of central and southern Europe and northern Africa.

Caught in my self made moth trap.

First 3 photos: In my yard, Hilversum, The Netherlands, 21 April 2019
4th photo: In my yard, Hilversum, The Netherlands, 22 April 2019
Last photo: In my yard, Hilversum, The Netherlands, 23 April 2020