Reviewed by Franz Jerby Delos Santos
How many months in a year have 30 days?
Answer: Four months in a year have 30 days
The Gregorian calendar, which is used in most parts of the world, divides the year into 12 months of varying lengths. Some months have 31 days, some have 30, and one month—February—usually has 28 or 29 days, depending on whether it is a leap year. Knowing which months have 30 days helps with scheduling, planning, and date calculations.
Methods
Math Tutor Explanation Using Month Listing Method
One way to determine which months have 30 days is to list out the months and their corresponding number of days. This allows you to easily identify and count those with 30 days.
Step 1: Write down all 12 months by name
Step 2: Next to each, note how many days it contains
Math Tutor Explanation Using the Knuckle Trick Method
The knuckle trick is a handy way to remember which months have 30 or 31 days. Each knuckle and groove of your hand corresponds to a month, with knuckles representing 31-day months and grooves 30-day or 28/29-day months.
Step 1: Make a fist and start counting months on your knuckles and the dips between knuckles
Step 2: Each knuckle is a 31-day month and each dip is a 30-day month (except for February)
Step 1:
Step 2:
Math Tutor suggests: Discover More About Months and Days
Expand your knowledge about months, days, and calendar facts with these related questions.
FAQ on Months and Days
Which months have 30 days?
April, June, September, and November each have 30 days
Which months have 31 days?
January, March, May, July, August, October, and December have 31 days
Does any month have fewer than 30 days?
Yes, February usually has 28 days, or 29 in a leap year
How can I easily remember how many days are in each month?
You can use the rhyme 'Thirty days hath September...' or try the knuckle trick
Why do different months have different numbers of days?
The lengths of months are based on historical changes made to align the calendar more closely with the solar year
Math & reading from 1st to 9th grade
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