Countdown timer to a date
Days, hours, minutes and seconds until any date and time. Shareable link, rings when it hits zero.
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How it works
Pick a date and time and the countdown runs live in days, hours, minutes and seconds. Copy link puts the target and name in the address, so anyone who opens it sees the same countdown in their own time zone. When it reaches zero the page rings with your alarm sound.
For a countdown in minutes rather than to a date, use the timer.