1428

High school (ages 12+)
Mathematics & Numbers

Name:

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/1428

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. What is the calendar system in use?Julian calendar
2. What is the leap year rule?Years divisible by four were designated as leap years
3. What made the year 1428 special?It had an extra day, February 29, because it was a leap year in the Julian calendar.
4. Why did 1428 have 366 days instead of 365?The Julian calendar added a day every four years to keep the calendar close to the solar year.

Julian Calendar: A solar calendar introduced by Julius Caesar, characterized by a leap year every four years, which was widely adopted in the Roman world and beyond.
Intercalary Day: An extra day added to a calendar, such as February 29th in a leap year, to synchronize the calendar with astronomical events.
Solar Year: The time it takes for the Earth to complete one orbit around the Sun, approximately 365.2422 days.
Gregorian Calendar: The calendar system currently in widespread use, which refined the leap year rule to achieve greater accuracy than the Julian calendar.