diff --git a/src/shared/dates.js b/src/shared/dates.js
index bed9b4a2..8113d5e3 100644
--- a/src/shared/dates.js
+++ b/src/shared/dates.js
@@ -109,7 +109,7 @@ export function getWeekNumber(date, calendarType = CALENDAR_TYPES.ISO_8601) {
       ? CALENDAR_TYPES.US
       : CALENDAR_TYPES.ISO_8601
   );
-  const beginOfWeek = getBeginOfWeek(date, calendarTypeForWeekNumber);
+  const beginOfWeek = getBeginOfWeek(date, calendarType);
   let year = getYear(date) + 1;
   let dayInWeekOne;
   let beginOfFirstWeek;
@@ -117,7 +117,7 @@ export function getWeekNumber(date, calendarType = CALENDAR_TYPES.ISO_8601) {
   // Look for the first week one that does not come after a given date
   do {
     dayInWeekOne = new Date(year, 0, calendarTypeForWeekNumber === CALENDAR_TYPES.ISO_8601 ? 4 : 1);
-    beginOfFirstWeek = getBeginOfWeek(dayInWeekOne, calendarTypeForWeekNumber);
+    beginOfFirstWeek = getBeginOfWeek(dayInWeekOne, calendarType);
     year -= 1;
   } while (date < beginOfFirstWeek);
 
diff --git a/src/shared/dates.spec.js b/src/shared/dates.spec.js
index 83652c46..0e22404b 100644
--- a/src/shared/dates.spec.js
+++ b/src/shared/dates.spec.js
@@ -221,9 +221,9 @@ describe('getWeekNumber', () => {
   });
 
   it('returns proper week number for a sample year starting in week 1 (US)', () => {
-    const year = 2015;
-    const month = 11;
-    const startDate = 27;
+    const year = 2016;
+    const month = 0;
+    const startDate = 1;
 
     for (let currentWeek = 1; currentWeek <= 53; currentWeek += 1) {
       const weekOffset = (currentWeek - 1) * 7;
@@ -264,7 +264,7 @@ describe('getWeekNumber', () => {
   });
 
   it('returns proper week number for a sample week 1 (Arabic)', () => {
-    const year = 2018;
+    const year = 2022;
     const month = 0;
     const startDate = 1;
 
@@ -293,7 +293,7 @@ describe('getWeekNumber', () => {
   });
 
   it('returns proper week number for a sample week 52 (Arabic)', () => {
-    const year = 2016;
+    const year = 2020;
     const month = 11;
     const startDate = 26;
 
@@ -307,7 +307,7 @@ describe('getWeekNumber', () => {
   });
 
   it('returns proper week number for a sample week 53 (Arabic)', () => {
-    const year = 2015;
+    const year = 2019;
     const month = 11;
     const startDate = 28;
 
@@ -321,7 +321,7 @@ describe('getWeekNumber', () => {
   });
 
   it('returns proper week number for a sample week 1 (Hebrew)', () => {
-    const year = 2018;
+    const year = 2017;
     const month = 0;
     const startDate = 1;
 
@@ -352,7 +352,7 @@ describe('getWeekNumber', () => {
   it('returns proper week number for a sample week 52 (Hebrew)', () => {
     const year = 2016;
     const month = 11;
-    const startDate = 26;
+    const startDate = 25;
 
     for (let currentDate = startDate; currentDate < startDate + 7; currentDate += 1) {
       const date = new Date(year, month, currentDate);
@@ -364,7 +364,7 @@ describe('getWeekNumber', () => {
   });
 
   it('returns proper week number for a sample week 53 (Hebrew)', () => {
-    const year = 2015;
+    const year = 2014;
     const month = 11;
     const startDate = 28;