TehShrike · January 10, 2020 19:43
diff --git a/daysInMonth.js b/daysInMonth.js
 // An expansion of https://stackoverflow.com/a/1184359/201789
 function daysInMonth (oneIndexedInputMonth, year) {
 	const zeroIndexedInputMonth = oneIndexedInputMonth - 1
 	
 	const theNextZeroIndexedMonth = zeroIndexedInputMonth + 1
 	const theFinalDayOfThePreviousMonth = 0
 	
 	return new Date(year, theNextZeroIndexedMonth, theFinalDayOfThePreviousMonth).getDate()
 }
	// An expansion of https://stackoverflow.com/a/1184359/201789
	function daysInMonth (oneIndexedInputMonth, year) {
	const zeroIndexedInputMonth = oneIndexedInputMonth - 1

	const theNextZeroIndexedMonth = zeroIndexedInputMonth + 1
	const theFinalDayOfThePreviousMonth = 0

	return new Date(year, theNextZeroIndexedMonth, theFinalDayOfThePreviousMonth).getDate()
	}