The astronomers use Julian days to keep track of celestial events.

Sorry Days are important for acknowledging past wrongs and working towards reconciliation.

I love shopping on Boxing Days.

I have marked the important events on my calendar days.

The civil days are Monday to Friday.

The contango days are causing a rise in oil prices.

There are many day cares in this neighborhood.

Many people have day jobs to support their passion projects.

The judge imposed day-fines on the defendants.

Many day-traders made a profit in the stock market today.