fix(calendar): address ARIA violation when a week with all days hidden is rendered (#1637)

---------

Co-authored-by: Radoslav Karaivanov <[email protected]>

Author: ddaribo

src/components/calendar/calendar-rendering.spec.ts

@@ -25,6 +25,16 @@ describe('Calendar Rendering', () => {
       await expect(calendar).shadowDom.to.be.accessible();
     });
 
+    it('passes the a11y audit when a week of hidden days is rendered - issue #1636', async () => {
+      const aprilFirst2025 = new CalendarDay({ year: 2025, month: 3, date: 1 });
+      calendar.activeDate = aprilFirst2025.native;
+      calendar.visibleMonths = 2;
+      await elementUpdated(calendar);
+
+      await expect(calendar).dom.to.be.accessible();
+      await expect(calendar).shadowDom.to.be.accessible();
+    });
+
     it('renders the calendar successfully', async () => {
       const today = CalendarDay.today.native;
       const day = new Intl.DateTimeFormat('en', { weekday: 'short' }).format(

src/components/calendar/days-view/days-view.ts

@@ -481,8 +481,12 @@ export default class IgcDaysViewComponent extends EventEmitterMixin<
     const last = weeks.length - 1;
 
     for (const [idx, week] of weeks.entries()) {
+      let hidden = false;
+      if (idx === 0 || idx === last) {
+        hidden = week.every((day) => this.getDayProperties(day, today).hidden);
+      }
       yield html`
-        <div role="row" part="days-row">
+        <div role="row" part="days-row" aria-hidden=${hidden}>
           ${this.showWeekNumbers
             ? this.renderWeekNumber(week[0], idx === last)
             : nothing}