ursa major
It is both, as Cassiopeia is one of the constellations that can be seen all year round.
Because in the summer the constellation would be in the daytime sky.
Constellations can be seen throughout the year, but different constellations are visible during different seasons. For example, during summer in the Northern Hemisphere, constellations like Scorpius and Cygnus are prominent in the night sky, while in winter, Orion and Taurus are more visible.
There are handful of constellations thought of as "Winter constellations" - you would have to specify the name of the constellation.
The circumpolar constellations
This is caused by the earth's rotation around the sun. There are five constellations in the sky all year around, but the earth's rotational path will only allow us to observe the ones that are closest during that season's orbit.
Orion is visible in the night sky during the winter months in the Northern Hemisphere and in the summer months in the Southern Hemisphere. It is one of the most easily recognizable constellations and can be seen for much of the year from different parts of the world.
seasons
In the northern hemisphere the constellations on the meridian on June 21 have a right ascension of 18 hours, and constellations from 15 to 18 hours can be seen in summer evenings. They are not as bright as the winter constellations. The main ones are Boötes (main star Arcturus), Corona Borealis, Serpens Caput, Libra, Hercules and Ophiuchus. In the southern sky, Scorpio (main star Antares). In the summer the circumpolar constellations like Cassiopeia, Ursa Major, Perseus and Draco can be seen although not in their usual winter positions.
at night.
Canis Major(the Big Dog), Canis Minor (the Little Dog) & Orion the Hunter
During the summer season, the winter seasonal constellations will not be visible in the night sky. This is because the Earth is positioned on the opposite side of the Sun from where these constellations are located, making them hidden from view at night.