The May rain has started to fall.

I can hear the sound of the May rain hitting the window.

The sky was threatening, so I decided to go out with an umbrella.

While having a picnic in the park, we were hit by a rain shower.

Due to the rainstorm, our picnic was cancelled.

When I look outside, it's raining.

He was studying all day.

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.