Countdown to Any Date and Time
Choose a fixed deadline, or the next yearly occurrence of a birthday or anniversary.
Calculated on your device
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Optional alerts
Keep this page open and your device awake. Background and lock-screen delivery is not guaranteed.
How this calculator works
A one-event share link points to the same fixed occurrence, even when opened from another time zone. Yearly saved calculations retain the recurrence rule; a shared event link and calendar export contain only the displayed occurrence. A fixed target in the past is shown as completed or as elapsed time. Your device clock and browser time-zone data determine the result.
Calculations stay on your device. Empty or invalid inputs produce an explicit error. Interactive results require JavaScript.
Save, share & recent calculations
Save on this device, or copy settings into a link. Shared links contain your inputs; share only the details you intend.