1470

High school (ages 12+)
History & Culture

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/1470

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 start day of the week?Monday
3. What was the calendar like in the year 1470?In 1470, people used the Julian calendar. It had a leap year every four years, adding an extra day to February. The year began on a Monday.
4. Why did the Julian calendar drift over time?The Julian calendar assumed a year of 365.25 days, but the real solar year is about 365.2422 days. That tiny difference of 11 minutes each year made the calendar slowly fall out of sync with the seasons.

Julian calendar: A calendar established by Julius Caesar, characterized by a leap year every four years.
Solar year (Tropical year): The time it takes for the Earth to complete one orbit around the sun relative to the seasons, approximately 365.2422 days.
Vernal equinox: The moment in spring when the sun crosses the celestial equator, resulting in nearly equal day and night.
Gregorian calendar: The calendar reform introduced in 1582, which corrected the Julian calendar's inaccuracies and is the basis for the modern international calendar.