📝 Commit Details:

backend/node_modules/date-fns/isLeapYear.js

@@ -0,0 +1,28 @@
+import { toDate } from "./toDate.js";
+
+/**
+ * @name isLeapYear
+ * @category Year Helpers
+ * @summary Is the given date in the leap year?
+ *
+ * @description
+ * Is the given date in the leap year?
+ *
+ * @param date - The date to check
+ * @param options - The options object
+ *
+ * @returns The date is in the leap year
+ *
+ * @example
+ * // Is 1 September 2012 in the leap year?
+ * const result = isLeapYear(new Date(2012, 8, 1))
+ * //=> true
+ */
+export function isLeapYear(date, options) {
+  const _date = toDate(date, options?.in);
+  const year = _date.getFullYear();
+  return year % 400 === 0 || (year % 4 === 0 && year % 100 !== 0);
+}
+
+// Fallback for modularized imports:
+export default isLeapYear;