Nearly every four years, we add an extra day to the calendar in the form of February 29, also known as Leap Day. Put simply, these additional 24 hours are built into the calendar to ensure that it stays in line with the Earth’s movement around the Sun. While the modern calendar contains 365 days, the actual time it takes for Earth to orbit its star is slightly longer—roughly 365.2421 days. The difference might seem negligible, but over decades and centuries that missing quarter of a day per year can add up. To ensure consistency with the true astronomical year, it is necessary to periodically add in an extra day to make up the lost time and get the calendar back in synch with the heavens.
Recommended Web Sites!
- Internet Public Library . The “Reading Room” is interesting. Books, magazine, journal links and much much more.
- File Extension Resource. Ever wonder what those extensions mean on a file? Check this site out for thousands of extensions, what they mean, and what programs open them
- The Purdue University Online Writing Lab ...MLA guidelines in research papers, and citing all sources from a single book to government ...
- New York Public Library's Digital Gallery provides free and open access to over 640,000 images digitized from the The New York Public Library's vast collections, including illuminated manuscripts, historical maps, vintage posters, rare prints, photographs and more.