I buy daily necessities at the supermarket every week.

This is the most beautiful flower.

The possibility of that plan succeeding is high.

He was studying all day.

I think she is ovulating today.

The day of ovulation is the day when a woman's possibility of getting pregnant is highest.

Today is my birthday.

He tried to solve the problem all day long.

Our store has a regular day off every Monday.

Our project is scheduled to be completed on the twentieth day of the month.