Event Countdown Timer
Target countdown with IANA time zones, working days, elapsed time for past dates, and shareable links.
Private by architecture:
All processing is 100% client-side memory. Your data never leaves this browser tab.
Event Configuration
Quick Presets:
Countdown Active
Upcoming Event
Timezone: UTC
0
Days
0
Hours
0
Minutes
0
Seconds
Working Days (Mon-Fri) 0
Total Hours 0
Total Seconds 0
About This Tool
Coordinating releases, deadlines, and international events requires taking time zone differences into account. An event scheduled for midnight in Tokyo is midday in London and morning in New York.
This countdown tool calculates remaining time against exact IANA time zone rules, correctly handling Daylight Saving Time shifts. In addition to days, hours, and minutes, it calculates total working business days (excluding weekends) and generates clean, shareable URLs so your team sees the exact same countdown.
Key Features
- IANA time zone precision: Select from global IANA time zones to eliminate confusion caused by regional daylight saving differences.
- Business working days remaining: View an automatic count of weekdays (Monday through Friday) remaining before your project deadline or product launch.
- Shareable URL links: Copy a direct link containing your event title, target date, time, and time zone for colleagues or attendees.
- Elapsed time for past events: Seamlessly switches into an elapsed-since tracker when the target date passes, with zero negative number glitches.
- Client-side privacy: All calculations are computed locally in your browser with no event names or dates logged on any server.
Frequently Asked Questions
How does this countdown handle Daylight Saving Time (DST)?
The tool uses the browser ECMAScript Intl.DateTimeFormat API with official IANA time zone definitions, automatically adjusting for historical and upcoming daylight saving transitions.
How are working days calculated?
Working days include all calendar days between today and the target date excluding Saturdays and Sundays.
Can I share my countdown with others?
Yes. Click the "Copy Shareable Link" button. The URL embeds the event title, date, time, and time zone so anyone opening the link sees the synchronized countdown.
What happens when the countdown reaches zero?
The timer transitions into an elapsed-time state, showing how many days, hours, and minutes have passed since the event occurred.
