Day after day, he continued to strive to solve the problem.

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

Today is my birthday.

Our store has a regular day off every Monday.

There is a proverb that says, 'Plan your day in the morning and your year on New Year's Day,' which means that you should plan your day in the morning and your year on New Year's Day.

When the sun rises, the world becomes bright.

Today is the final day of the trip.

Which day will you depart?

Himiko is my best friend.

Hiyako is my best friend.