Another day, another js date edge-case

src/helpers/time/parseDate.ts

@@ -291,7 +291,16 @@ const getDayFromText = (text: string) => {
 	}
 
 	const date = new Date()
-	date.setDate(parseInt(results[0]))
+	const day = parseInt(results[0])
+	date.setDate(day)
+	
+	// If the parsed day is the 31st but the next month only has 30 days, setting the day to 31 will "overflow" the
+	// date to the next month, but the first.
+	// This would look like a very weired bug. Now, to prevent that, we check if the day is the same as parsed after 
+	// setting it for the first time and set it again if it isn't - that would mean the month overflowed.
+	if(day === 31 && date.getDate() !== day) {
+		date.setDate(day)
+	}
 
 	if (date < new Date()) {
 		date.setMonth(date.getMonth() + 1)

src/modules/parseTaskText.test.js

@@ -185,7 +185,7 @@ describe('Parse Task Text', () => {
 
 			expect(result.text).toBe('Lorem Ipsum')
 			expect(result.date.getDate()).toBe(date.getDate())
-			expect(result.date.getMonth()).toBe(date.getMonth() + 1)
+			expect(result.date.getMonth()).toBe(result.date.getDate() === 31 ? date.getMonth() + 2 : date.getMonth() + 1)
 		})
 		it('should recognize dates of the month in the future', () => {
 			const nextDay = new Date(+new Date() + 60 * 60 * 24 * 1000)