diff --git a/pages/cart/publishers/import.tsx b/pages/cart/publishers/import.tsx
index 99cda46..81d3824 100644
--- a/pages/cart/publishers/import.tsx
+++ b/pages/cart/publishers/import.tsx
@@ -183,7 +183,7 @@ export default function ImportPage() {
                 let day = new Date();
                 day.setDate(1); // Set to the first day of the month to avoid overflow
                 if (importDate && importDate.value) {
-                    let monthOfIportInfo = common.getMonthInfo(importDate.value);
+                    let monthOfIportInfo = common.getMonthInfo(new Date(importDate.value));
                     day = monthOfIportInfo.firstMonday;
                 }
 
diff --git a/src/helpers/common.js b/src/helpers/common.js
index f2cf555..b732095 100644
--- a/src/helpers/common.js
+++ b/src/helpers/common.js
@@ -249,6 +249,8 @@ exports.getDateFromWeekNrAndDayOfWeek = function (firstMonday, weekNr, dayOfWeek
 }
 
 exports.getMonthDatesInfo = function (date) {
+    // cast to date if not daate
+    date = new Date(date);
     // get first day of the month
     var firstDay = new Date(date.getFullYear(), date.getMonth(), 1);
     // get first day of next month