About SSLCalendar

After entering your domain and email address, you will receive a link by email to an ICS calendar. You can subscribe to this calendar feed to always stay up-to-date with your certificate expirations.

Why a Calendar for Certificate Monitoring?

Unlike specialized security dashboards that require learning new interfaces, SSLcalendar integrates seamlessly with the calendar apps you already use daily (Google Calendar, Outlook, Apple Calendar). Certificate expirations appear as regular calendar events alongside your meetings and deadlines, eliminating "tool fatigue" and ensuring you never miss critical renewals.

Zero False Alerts

SSLcalendar only alerts you about certificates that are actively protecting your websites. Powered by SSLboard's technology, we distinguish between certificates that merely exist and those actually securing traffic. This eliminates the noise of irrelevant alerts about unused certificates, ensuring every notification requires action.

Certificate Lifetime Changes

SSL certificate validity periods are shrinking significantly:

• Current: Up to 398 days
• March 2026: Reduced to 200 days
• March 2027: Further reduced to 100 days
• March 2029: Final standard of 47 days maximum

This industry-wide change means you'll need to renew certificates much more frequently. SSLcalendar helps you stay ahead of these tighter timelines.

Real-World Protection

SSLcalendar is powered by the same technology that detected unauthorized certificate issuance for major services like Cloudflare's 1.1.1.1 DNS resolver. By monitoring Certificate Transparency logs, we catch potential security issues before they impact your sites.

Preparing for Shorter Lifetimes

As certificates become shorter-lived, automation becomes essential:

• Use automated renewal services like Let's Encrypt
• Implement comprehensive monitoring across all domains and subdomains
• Set up calendar-based reminders to avoid last-minute renewals
• Consider professional certificate management services for large deployments

We respect your privacy. We will not spam you, and you have the right to remove your subscription at any time by clicking the unsubscribe link in the email.