This rock is rich in silicate.

Citrate plays an important role in organic chemistry.

I learned about the properties of arsenate in chemistry class.

This fertilizer is rich in phosphates.

The first day of the month is the beginning of a new month.

I will hold my birthday party on the fifth day of the month.

Every sixth day of the month, we go on a picnic as a family.

There is a test in two days.

I will hold my birthday party on the fourth day of the month.

Our new project will start on the third day of the month.