He is working hard on his Japanese studies day by day.

Every day, he exercises at the gym.

My father drinks milk every morning.

She drinks milk every day to maintain her health.

He always comes late, so it's hard to wait.

The thirteenth day is my birthday.

We celebrate our wedding anniversary on the twenty-fifth day of the month.

This movie is rated R-18, so people under the age of 18 cannot watch it.

The rechargeable battery has run out, so I'm going to buy a new one.

He was reading a book in his room all day.