Many families celebrate the birthdays of relatives born on leap days with special gatherings every four years.

The farmer tracked degree days to predict the best planting date.

People in the town still tell stories about the old days when the river ran clear and children played freely.

The old calendar listed many feast days dedicated to local saints.

The historian listed all the D-Days that changed the course of the war.

After several Anzac Days in a row of wet weather, the parade organizers were relieved when the sun finally appeared.

Our school organizes two sports days every year to encourage teamwork and fitness.

In many European countries, name days are celebrated with as much enthusiasm as birthdays.

Our school organizes field days every spring to bring students together for friendly competition.

The project required 120 man-days to complete the initial phase.