Did you procrastinate on filing your taxes again this year? Are you wondering what time your returns are due? Here's what to ...

These graphics explain why Easter Sunday changes each year based on ancient interpretations of the solar and lunar cycles.

Easter on April Fools' Day is a thing. One of the most important holidays in Christianity, here's when the two coincided ...

House Republicans are so intent on avoiding tough votes on President Trump’s tariffs that they have rewritten the calendar.

Baisakhi, a significant Sikh holiday also known as Vaisakhi, marks the Solar New Year and the start of the harvest season, ...

For more than 400 years, Catholic and Orthodox churches have used different ways to determine the date of Easter. But this ...

Many people who practice polyamory take pleasure in scheduling sex in advance. Here, PS explores the concept of a "calendar ...

Whenever someone sends a proposed meeting date and time, iOS recognizes that and Apple Calendar lets you take action on it. This uses the iOS ‘data detectors’ system, which tags certain types ...

Microsoft added a clock to the Windows 11 Calendar flyout after user outrage. The feature has recently been removed from ...

Carvings on a 12,000-year-old monument in Turkey appear to mark solar days and years, making it possibly the oldest solar ...

Easter's date changes annually because it is based on the lunar calendar. It occurs on the first Sunday after the Paschal ...