added a function that can compute months between two dates

src/utils/dateUtils.ts

@@ -14,3 +14,18 @@ export function computeYearsBetweenDates(date1: string, date2: string): number {
     
 	return Math.abs(yearDiff);
 }
+
+/**
+ * computeMonthsBetweenDates computes the month difference between two dates.
+ * @param date1 the first date as a string
+ * @param date2 the second date as a string
+ * @returns the absolute value of the month difference.
+ */
+export function computeMonthsBetweenDates(date1: string, date2: string): number{
+	const momentDate1 = moment(date1);
+	const momentDate2 = moment(date2);
+
+	const monthDiff = momentDate1.diff(momentDate2, 'months');
+
+	return Math.abs(monthDiff);
+}
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