Astronomers measured the planet's rotation over several sidereal days to determine its axial tilt.

The resort reported a record number of skier days this season thanks to the unusually long snowpack.

The professor scheduled extra office hours on speech days to help nervous students rehearse.

During the summer, we spent many stellar days stargazing along the coast.

Local fishermen schedule their trips around the tide days to ensure safe navigation.

During the Victory Days, people gathered in the square to celebrate the end of the long conflict.

We try to get all the clothes done early on washing days so we can relax the rest of the weekend.

Many people travel to their ancestral villages during the holy days to honor family traditions.

In countless hymns and sermons, believers invoked the Ancient of Days as the source of all wisdom and justice.

We reserve the first three Baker days of each month for training new staff.