How many seconds are there in one minute?

60 seconds = 1 minute

How many hours are there in one day?

24 hours = 1 day

What is a leap year?

A leap year is a year that is divisible by 4, except for century years not divisible by 400.

How many days does February have in a leap year?

29 days

What is a solar month?

The time taken by Earth to complete one revolution around the Sun — approximately 28 days.

If today is Friday, what will be the day after 91 days?

It will be Friday again because 91 days is exactly 13 weeks.

If today is Saturday, what will be the day after 59 days?

It will be Tuesday, as 59 days equals 8 weeks and 3 days.

To calculate the number of days between two dates, you must ___ and ___.

Subtract the earlier date from the later date and subtract 1 to exclude both start and end dates.

If today is Monday, what was the day before 45 days?

It was Friday, as 45 days equals 6 weeks and 3 days back.

How many years are there between 5 BC and 10 AD?

There are 14 years; 5 BC to 1 AD is 5 years, plus 10 years from 1 AD to 10 AD.

In 100 years, there are ___ odd days.

5 odd days, calculated from 124 total odd days divided by 7.

True or False: There is a year zero in the Gregorian calendar.

False. There is no year zero; the calendar transitions from 1 BC to 1 AD.

Extra days beyond complete weeks are called ___ days.

Odd days, used to calculate the day of the week for a given date.