Lunar calendar

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/lunar-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 Lunar calendar?Approximately 354.367 days (12 synodic months)
2. What is the basis of measurement?Synodic months, determined by the Moon's phases
3. What is the synodic month duration?Approximately 29.53059 days
4. Why do lunar months sometimes have 29 days and sometimes 30 days?The Moon takes about 29.53 days to go through its phases. Months alternate between 29 and 30 days to match that length.
5. How does a lunar calendar stay in sync with the seasons?Purely lunar calendars drift each year, so after about 33 years the months line up with all seasons again. Lunisolar calendars add extra months to keep seasons steady.

Synodic Month: The period of approximately 29.5 days for the Moon to complete a cycle of phases relative to the Sun.