From cc6575d2d0430f61b7e5e9c541ecb307c05df44e Mon Sep 17 00:00:00 2001
From: Alex Tselegidis <alextselegidis@gmail.com>
Date: Mon, 19 Jul 2021 15:52:05 +0300
Subject: [PATCH] JavaScript RangeError on appointment change causing disabled
 calendar dates (#1092).

---
 assets/js/frontend_book_api.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/assets/js/frontend_book_api.js b/assets/js/frontend_book_api.js
index 68c708e4..7593c82c 100755
--- a/assets/js/frontend_book_api.js
+++ b/assets/js/frontend_book_api.js
@@ -274,7 +274,7 @@ window.FrontendBookApi = window.FrontendBookApi || {};
 
         // Select first enabled date.
         var selectedDate = Date.parse(selectedDateString);
-        var numberOfDays = new Date(selectedDate.getFullYear(), selectedDate.getMonth() + 1, 0).getDate();
+        var numberOfDays = moment(selectedDate).daysInMonth();
 
         if (setDate && !GlobalVariables.manageMode) {
             for (var i = 1; i <= numberOfDays; i++) {