Add getMonthsDiffBetweenDates

snippets/getMonthsDiffBetweenDates.md

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+---
+title: getMonthsDiffBetweenDates
+tags: date,intermediate
+---
+
+Returns the difference (in months) between two dates.
+
+Use `Date.prototype.getFullYear()` and `Date.prototype.getMonth()` to calculate the difference (in months) between two `Date` objects.
+
+```js
+const getMonthsDiffBetweenDates = (dateInitial, dateFinal) =>
+  Math.max(
+    (dateFinal.getFullYear() - dateInitial.getFullYear()) * 12 +
+      dateFinal.getMonth() -
+      dateInitial.getMonth(),
+    0
+  );
+```
+
+```js
+getMonthsDiffBetweenDates(new Date('2017-12-13'), new Date('2018-04-29')); // 4
+```