Calendar component – Disabled day cells rendered with aria‑selected="false" on non‑interactive <span>

Describe the bug

In version 10.9.7 of PrimeReact, using the Calendar component with e.g. minDate, maxDate, disabledDays, or non‑selectable days results in day‑cells that are non‑selectable, rendered as s (no role) but still carry the attribute aria‑selected="false".

Why this is a problem:
According to the ARIA specification, the aria‑selected attribute is only valid on elements with roles that support selection (such as gridcell, option, row, or tab).

Having aria‑selected="false" on a without a selection role triggers accessibility tool errors (e.g., Axe DevTools reports: “Ensure an element’s role supports its ARIA attributes. ARIA attribute is not allowed: aria-selected="false"”).

Reproducer

https://stackblitz.com/run?file=src%2FApp.tsx

System Information

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 20.19.1 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.8.2 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    primereact: latest => 10.9.7 
    react: 18.3.1 => 18.3.1

Steps to reproduce the behavior

1. Render (or a disabled‑dates setup)

2. Inspect a disabled‑day cell (for example, outside minDate/maxDate or a day disabled via disabledDays)

3. The cell is a <span class="p-disabled" … aria‑selected="false" …>

4. Inspect Calendar layout with Axe Dev Tools - it reports: “ARIA attribute is not allowed: aria‑selected=”false””

Expected behavior

• For non‑selectable/disabled cells, aria‑selected should not be present, or the cell should have a role supporting aria‑selected.

• The appropriate attribute might be aria‑disabled="true" or no ARIA selected attribute for disabled non‑interactive cells.

Please, remove the aria‑selected="false" attribute from disabled day cells (or apply the correct role) to resolve the accessibility violation.

Start with the PrimeReact Calendar component and reproduce the issue using the linked StackBlitz example with minDate, maxDate, or disabledDays. Inspect the rendered disabled day cells and verify that the accessibility violation is resolved without regressing selectable cells.