Assess your knowledge with this brief Quiz and test your abilities with the exercises in the section below it.

1. Why is it that the day after October 4, 1582 was October 15, 1582?

2. How many 31 day months are there in a Gregorian year?
   (This one is truly easy, isn't it?)

3. Why is it that SEPTembre doesn't still hold the seventh place in the order of the months?

4. In the Gregorian calendar, how many models of years are there? And how many models of months?

5. Before the adoption of the seven day week in the year 321, how many days the roman 'week' did have?

6. How many months per year did the Romans have at that time?

7. The months of July and August were named after which emperors?

8. Why is it that a lunar month is longer than the moon's rotation around the earth?

9. What is the Meton cycle and to what purpose is it used?

LET'S HAVE FUN NOW!

You may find the following exercises quite simplistic or, depending of your level of fatigue, a bit confusing at first. Let's not forget that it's a brand new concept and that even the simplest innovation requires adaptation. However, once you'll get used to it, you'll go through it like a breeze. All depicted months below belong to 2015 and are available for download in the Downloads section.