Enter your webinar date, start time, and source time zone, pick the audiences you're inviting, and get copy-ready event times for every zone — for emails, social posts, and add-to-calendar links. Day-boundary crossings are flagged automatically.
Auto-detected from your browser — change it if your webinar runs in another zone.
Optional — turn on to announce a time range.
Pick a preset above or add zones below to get started.
No matching zones.
For email bodies and event pages.
For subject lines and social posts.
Pastes into Gmail & Outlook with bold cities and line breaks.
Generated client-side with the correct UTC time — share these so attendees see the event in their own zone.
When your webinar has a global audience, listing a single time is a recipe for confusion. The fix is simple: always show the time in each audience's own zone, and always include the zone abbreviation so there's no ambiguity. A few best practices:
The single most common webinar time zone error is the EST vs EDT trap. Most of the year the US East Coast is on Eastern Daylight Time (EDT, UTC-4), but from early November to mid-March it switches to Eastern Standard Time (EST, UTC-5). Hardcode "EST" on a summer webinar and everyone who converts it correctly arrives an hour late. This tool reads the abbreviation straight from your browser's time zone database for your actual event date, so it always shows EST or EDT — GMT or BST, AEST or AEDT — correctly.
The second trap is day-boundary confusion. A 9:00 PM New York start is already the next calendar day in Singapore, Tokyo, and Sydney. If your announcement says "Tuesday 9:00 AM SGT" without noting it's Wednesday, your APAC registrants mark the wrong day and miss the session entirely. The announcer highlights any zone that lands on a different date in amber and appends the correct weekday and date — the detail that turns registrants into actual attendees.
Once your times are announced, keep your event running smoothly with the rest of our free toolkit: add a countdown timer for your webinar to build anticipation before you go live, and after the session use the Zoom attendance percentage checker to see exactly who attended enough to qualify for a certificate.
Running a certification webinar? CertFusion's webinar certificate feature auto-issues branded, verifiable certificates to every qualified attendee — no manual list-building required.
Enter your event date, start time, and the time zone you're hosting from, then pick the audiences you're inviting. The tool instantly converts your start time into each zone — complete with the correct abbreviation (like EDT or BST) — and gives you copy-ready text for emails and social posts plus add-to-calendar links.
Yes. All conversions use your browser's built-in time zone database (via Intl), which knows every daylight saving rule for the specific date of your event. That means a July webinar correctly shows EDT while a January webinar shows EST, with no lookup tables or manual adjustments.
Because it genuinely falls on a different calendar day. An evening start in the Americas is already the next morning in Asia-Pacific. The tool flags any zone that lands on another date in amber and shows the correct weekday and date, so your attendees never mark the wrong day.
No. Everything runs in your browser. Your date, time, and title are never uploaded anywhere — the calendar links and .ics file are generated locally on your device.
CertFusion automatically sends branded, verifiable certificates to your attendees — so the only admin left after your webinar is celebrating the turnout.
Issue Certificates with CertFusion