How to Instantly Know Which Months Have 31 Days

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**How to Instantly Know Which Months Have 31 Days**

Ever find yourself wondering, *“Wait… does September have 30 or 31 days?”* You’re not alone! Even adults sometimes pause to double-check their calendars. But here’s the good news: there are two clever and simple tricks to **instantly** remember which months have 31 days — no guessing, Googling, or calendars required.

Let’s break it down.

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### 📆 The Basic Rule of Month Lengths

There are 12 months in a year. Here’s how they break down:

* **31 days** – January, March, May, July, August, October, December
* **30 days** – April, June, September, November
* **28 or 29 days** – February (depending on leap year)

But remembering that list can be tricky. So here are **two foolproof tricks** to make it automatic.

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### ✊ Trick #1: The Knuckle Method (Your Hand Knows!)

This classic trick uses your **knuckles and the spaces between them** to tell which months have 31 days.

#### Here’s how it works:

1. Make a fist with one hand.
2. Start on the knuckle of your **index finger** and name the months going left to right across your knuckles and the dips between them.
3. Each **knuckle** = a month with **31 days**
4. Each **dip** = a month with **30 days** (except February, of course)