21 lines
585 B
Markdown
21 lines
585 B
Markdown
---
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title: daysInMonth
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tags: date,beginner
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firstSeen: 2021-06-13T05:00:00-04:00
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---
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Gets the number of days in the given `month` of the specified `year`.
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- Use the `new Date()` constructor to create a date from the given `year` and `month`.
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- Set the days parameter to `0` to get the last day of the previous month, as months are zero-indexed.
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- Use `Date.prototype.getDate()` to return the number of days in the given `month`.
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```js
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const daysInMonth = (year, month) => new Date(year, month, 0).getDate();
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```
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```js
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daysInMonth(2020, 12)); // 31
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daysInMonth(2024, 2)); // 29
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```
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