How to use the countdown calculator

Settings and the last target are restored from localStorage on revisit. Nothing is sent to a server.

Workflow

1. Enter a target date and time (defaults to your local timezone). Step 1 completes the workflow described on the homepage; repeat or adjust inputs before the next action.
2. Optionally add an event label such as “Product launch”. Step 2 completes the workflow described on the homepage; repeat or adjust inputs before the next action.
3. Watch the live countdown update every second in the main stage. Step 3 completes the workflow described on the homepage; repeat or adjust inputs before the next action.
4. Use Options to switch between countdown and days-since, choose units, 12h/24h display, and a card theme. Step 4 completes the workflow described on the homepage; repeat or adjust inputs before the next action.
5. Copy shareable text for social captions, or open fullscreen for a clean screenshot. Step 5 completes the workflow described on the homepage; repeat or adjust inputs before the next action.

Worked examples

• Event launch: Set a local launch time and show days and hours on a shared screen. Use the primary control (Set target) after setting options appropriate to this scenario.
• Anniversary: Use days-since mode to display how long it has been since a date. Use the primary control (Set target) after setting options appropriate to this scenario.

Before you roll

Countdown Calculator is for people who want a clear timer for an upcoming event or a simple elapsed-time view after it happens. Choose a date and time in your browser’s local timezone, add an optional label, and select the units and display style that make sense for the audience.

Confirm everyone agrees what Set target means for your group before you rely on a single outcome.

Open Options or the sidebar when labels are hidden on small screens.

If something looks wrong

If results look wrong: The timer uses the device clock and local timezone; it does not send alerts or guarantee clock accuracy.

Mobile and keyboard notes

Set target is reachable from touch and keyboard.

Legal and how-to pages do not load third-party ad scripts.