Gregorian calendar

High school (ages 12+)
Mathematics & Numbers

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Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/gregorian-calendar

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. How long is Gregorian calendar?365.2425 days
2. What is the calendar system type?Solar calendar
3. What is the year of promulgation?1582
4. What is the Gregorian calendar and why was it made?The Gregorian calendar is the calendar we use all over the world. It was created to fix mistakes that had built up in the older Julian calendar, so that the seasons and holidays stay in the right places.
5. How does the Gregorian calendar decide if a year is a leap year?A year is a leap year if it can be divided by 4. But if it can also be divided by 100, it is not a leap year, unless it can be divided by 400, in which case it is a leap year.

Tropical Year: The time it takes the Earth to complete one orbit around the Sun relative to the seasons.
Vernal Equinox: The astronomical moment when the Sun crosses the celestial equator moving north, marking the start of spring.
Papal Bull: An official decree or proclamation issued by a Pope.
Geocentric Theory: An outdated astronomical model where Earth is considered the center of the universe.