How it's calculated
Time left = target date/time − now
target = chosen date and time, now = current moment. The difference is split into days, hours, minutes and seconds.
Common questions
Does the countdown update on its own?
Yes. It refreshes every second so the timer stays live while the page is open.
Can I count down to a specific time of day?
Yes. Add a target time alongside the date and the countdown lands on that exact moment.