Source: Neatorama
Check the calendar on your computer or your phone. Until what year does it allow you to reach? It might not go on for 100 years, it might not even reach 2100. And that’s given since we probably won’t live for that long. How about this: try going as far back as you can. You probably won’t be able to go beyond 1900.
What if there were a calendar that can track all days, months, and years from the year 1 to 4000? You might think such a thing is too tedious to build or even unnecessary. Who would want to know on which day a certain date a thousand years from now fall? Well, the astronomer and mathematician Giovanni Antonio…The post The Perpetual Calendar appeared first on FeedBox.