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

May Days were marked by parades, picket lines, and impassioned speeches across the region.

We spent several Christmas Days at my grandparents' cabin, building snowmen and swapping stories by the fire.

If you keep lying to me, one of these days I'm going to stop helping you.

The university's open days attract prospective students from across the country.

I always keep a stack of good books and a warm blanket for rainy days.

Traditionally, rents were collected on the quarter-days throughout the year.

Shoppers lined up early to take advantage of the store's dollar days, when hundreds of items were priced at just one dollar.

After moving between states for work, we marked two separate Labor Days to stay connected as a family.

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