1644

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/1644

1. What is the gregorian calendar start day?
2. What is the decade position?
3. What made 1644 a leap year in both calendars?
4. Why were there 10 days difference between Julian and Gregorian calendars in 1644?

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 gregorian calendar start day?Friday
2. What is the decade position?The 5th year of the 1640s decade
3. What made 1644 a leap year in both calendars?1644 had 29 days in February in both the Julian and Gregorian calendars, so it was a leap year in both systems.
4. Why were there 10 days difference between Julian and Gregorian calendars in 1644?The Gregorian calendar was 10 days ahead of the Julian calendar because the Gregorian reform corrected the Julian calendar’s drift, and by 1644 that difference had grown to 10 days.

Gregorian Calendar Reform: The 1582 papal bull that introduced a more accurate solar calendar, gradually replacing the Julian calendar.
Julian Calendar: The Roman calendar established by Julius Caesar, characterized by a leap year every four years, leading to a slight inaccuracy over centuries.
Roman Numeral System: An ancient numeral system that uses combinations of Latin letters (I, V, X, L, C, D, M) to represent numbers.
Solar Year: The time it takes for the Earth to complete one orbit around the Sun, approximately 365.2422 days.