Date & Time
Countdown Timer
Create a live countdown to any future date and time. Watch the seconds tick away in real-time.
Set a target date and click Start Countdown
Countdown
0
Years
0
Months
0
Days
0
Hours
0
Minutes
0
Seconds
How is this calculated?
Method: Real-time difference calculation using calendar-aware date math.
Every second, the countdown calculates the exact difference between now and the target date, accounting for varying month lengths and leap years.
Every 1000ms:
diff = targetDate - now
years = target.year - now.year (adjusted)
months = remaining months after years
days = remaining days after months
hours = floor((remainingMs % 86400000) / 3600000)
minutes = floor((remainingMs % 3600000) / 60000)
seconds = floor((remainingMs % 60000) / 1000)Countdown history
No countdowns yet.
FAQ
Frequently asked questions
How does the live countdown work?
The countdown uses setInterval to update every second, calculating the difference between the current time and your target date/time. It shows years, months, days, hours, minutes, and seconds remaining in real-time.
What happens when the countdown reaches zero?
When the target date/time is reached, the countdown displays "Event reached!" and stops updating. If the target is in the past, it will indicate the event has already occurred.
Can I set a specific time or just a date?
You can set both. The time field is optional — if left empty, the countdown targets midnight (00:00:00) on the selected date. Adding a time gives you precision down to the second.
Does the countdown work if I close my browser?
The countdown parameters are saved in your URL and local history. When you reopen the page with the same URL parameters, it will resume counting down to your target. The countdown calculates from the current time, so it is always accurate.
How can I share my countdown with others?
Click the Share button to copy a URL containing your countdown parameters. Anyone who opens that link will see a live countdown to the same target date and time.