Is there a trick to learning how many days are in a each month for one year

memorize this poem (sing it).

30 days hath September,
April, June and November,
All the rest have 31,
Excepting February alone.
Which only has but 28 days clear
And 29 in each leap year

Yes.

I learned this when I was a child -- and now almost 70 years later I still remember it.

30 days hath September, April, June and November.

All the rest have 31, except February which has 28.

I "count" on the knuckles of my hand, going "hill" then "valley" matching with Jan, Feb, etc

When on a hill, its 31, in a valley it is 30, unless Feb, which I know anyway.
When I get to the last high knuckle, that would be July, I start over . Of course that is another hill for August.

Yes, there is a trick to remember the number of days in each month for one year. It is called the knuckle trick or the "Thirty days hath September" rhyme.

To use the knuckle trick, you need to look at your knuckles and the spaces between them. Start with your left hand and assign each knuckle and space a month, starting with January on the knuckle of your left pinky finger. January (knuckle), February (space), March (knuckle), April (space), and so on until you reach the pinky finger of your right hand.

Now, here's the trick to remember the number of days: if a month falls on a knuckle, it has 31 days. If it falls on a space, it has fewer days. Except for February, which always has 28 days except during a leap year when it has 29 days.

For example:
- January (knuckle) has 31 days.
- February (space) has 28 days (except during leap year when it has 29 days).
- March (knuckle) has 31 days.
- April (space) has 30 days.
- And so on.

If you want to memorize the number of days using a rhyme, you can use the "Thirty days hath September" rhyme. It goes like this:

Thirty days hath September,
April, June, and November.
All the rest have thirty-one,
Excepting February alone,
With twenty-eight days clear,
And twenty-nine in each leap year.

So, with the knuckle trick and the "Thirty days hath September" rhyme, you can easily remember the number of days in each month for one year.