I go for a run every day of the week and twice on Sunday.

I can eat pizza any day of the week and twice on Sunday.

I go for a run every day of the week and twice on Sundays.

I can eat pizza any day of the week and twice on Sundays.

The sundawn painted the sky with vibrant colors.

The sundawns painted the sky with vibrant colors.

I have a collection of Sunday boards.

Quadragesima Sunday is a significant day in the Christian calendar.

My friend's name is Fig Sunday.

Oculi Sunday is an important day in Roman Catholicism.