Use this address in your calendar app as a subscribed calendar (iCalendar / .ics feed). Most apps call it “Subscribe” or “From URL”—paste the same link Google or Apple asks for.

Google Calendar

1. Open Google Calendar in a browser.
2. Next to Other calendars, open the plus (+) menu and choose From URL.
3. Paste the link above and add the calendar. Updates sync automatically on a schedule.

Apple Calendar

1. Mac: In Calendar, choose File → New Calendar Subscription…, paste the link, then click Subscribe.
2. iPhone / iPad: Open Settings → Calendar → Accounts → Add Account → Other → Add Subscribed Calendar, then paste the link.

Note: Calendar subscriptions are typically read-only and may take some time to refresh depending on the calendar app (Usually every 8-12 hours).