Revised Julian calendar

Okay, so you know how we have a calendar to keep track of months and days and when holidays happen? In some places of the world, like parts of Europe and the Middle East, they use a special calendar called the Julian calendar. But sometimes that calendar doesn't work perfectly because it doesn't match up exactly with the time it takes for the Earth to go around the sun.

So some smart people got together and made a new and improved version of the Julian calendar, called the Revised Julian calendar. It's like the original Julian calendar, but with some changes to make it more accurate.

One of the big differences is that the Revised Julian calendar adds an extra day to some years. This day is called a leap day, and it happens every four years. This helps make sure that the calendar lines up better with the actual length of a year (which is about 365 and 1/4 days).

The Revised Julian calendar is used by some Orthodox Christian churches to figure out when Easter happens. They have special rules about when Easter can and can't happen, and the Revised Julian calendar helps them keep track of everything correctly.

So yeah, the Revised Julian calendar is a special calendar that some people use to keep track of time and holidays. It's like the original Julian calendar, but with some extra stuff to make it more accurate.