How often is a leap day added to the calendar?

• Every year

• Every two years

• Every four years

• Every ten years

Why do we add an extra day to the calendar nearly every four years?

• To account for the extra hours accumulated due to the Earth's slightly longer orbit time

• To align the calendar with the lunar cycle

• To correct for the drift in ancient calendars

• To accommodate for time zone differences

What is the actual time it takes for Earth to orbit its star?

• 365 days

• 365.2421 days

• 364 days

• 366 days

What type of calendars periodically require the addition of extra months, known as intercalary or interstitial months?

• Gregorian calendars

• Julian calendars

• Lunisolar calendars

• Solar calendars

What was the main reason Julius Caesar re-ordered the Roman calendar?

• To create a system based on the stars

• To align with the Egyptian solar calendar

• To conquer Gaul

• To introduce the concept of an empire

When did the Julian Calendar take effect?

• January 1st, 45 B.C.E.

• February 29th, 45 B.C.E.

• March 1st, 44 B.C.E.

• December 31st, 46 B.C.E.

What modification did Sosigenes of Alexandria suggest to the Roman calendar?

• Adding a day to every month

• Adding two extra-long months to a year

• Adding a day to every fourth year

• Relying on the stars for intercalation

By how many minutes did the Julian calendar overestimate the solar year?

• 11 minutes

• 10 minutes

• 12 minutes

• 15 minutes

Approximately how many years will pass before another correction to the Gregorian calendar will be necessary?

• 303 years

• 3,030 years

• 30,300 years

• 300 years

According to tradition, what day did St. Patrick designate for women to propose to men?

• February 28

• February 29

• March 1

• March 17