A personal Google Calendar event-sharing link can stop working for reasons other than a browser fault. Its age, event state, ownership, and guest permissions matter. Check those conditions before sending repeated copies of the same URL or broadening calendar access unnecessarily.
Identify the link workflow
Confirm that the URL came from Invite via link for an eligible personal-account event. This differs from a public-calendar Publish event link or a calendar subscription address. Use the official guidance for the specific sharing route instead of treating every Calendar URL identically.
Check expiry and event changes
Google’s event-sharing help says the link can expire after 90 days, stop working after the event passes or is deleted, or be affected by updated guest permissions. If the event was transferred, the new owner should generate an appropriate new link.
Recurring events require a link for each instance. A working link for one week should not be assumed to invite a person to every occurrence in the series.
Verify the replacement route
Review the event and its intended audience before generating or distributing another link. Turning off See guest list affects the event page link, so understand that relationship before treating a privacy change as an error. Test the correct current URL through a representative recipient context and inspect the resulting guest list. Do not publish a private calendar merely to repair a single invitation link. The goal is a deliberate, appropriate event-sharing route rather than access through any method that happens to open a page.
References
Reviewed against the linked official product guidance on November 4, 2026. Features, limits, screen labels, and access can vary by account, platform, region, and organization policy.