Question 1

How does the dual-mode "Countdown" and "Time Elapsed" mechanism function?

Accepted Answer

Seamless bidirectional timeline calculation:

① Future Events (Countdown / Remaining Time):
When the specified target datetime is set in the future, the timer counts down live in days, hours, minutes, and seconds.

② Past Events (Time Elapsed Accumulator):
When target datetime has passed (e.g. wedding anniversary, smoke-free days, project launch), the system automatically flips to elapsed mode to track accumulated time.

Question 2

What happens if I set a target date in the past?

Accepted Answer

Automatic transition to a milestone tracker:

① Status Badge:
The status indicator switches dynamically from "REMAINING TIME" to "TIME ELAPSED".

② Use Cases:
Ideal for celebrating milestones (baby age, sobriety tracker, workout streaks, relationship milestones).

Question 3

Can I customize which time units (years, months, days, hours, minutes, seconds) are displayed?

Accepted Answer

Flexible custom unit combinations:

① Multi-Unit Toggles:
Check or uncheck individual unit boxes in setup (e.g., show only Days/Hours/Mins/Secs or Years/Months/Days).

② Automatic Rebalancing:
The math engine dynamically redistributes the remaining duration according to your active units.

Question 4

How do I share a customized countdown timer via URL with friends or a remote team?

Accepted Answer

Stateless parameter sharing without account logins:

① One-Click Share URL:
Click "Copy Share Link" to generate an encoded URL containing event title, target timestamp, and display units.

② Instant Loading:
Recipients open the link to view the exact customized timer immediately, suitable for bookmarking or presentation dashboards.

Question 5

What features are optimized for Fullscreen Mode on large TVs or conference projectors?

Accepted Answer

Built for stage, venue, and boardrooms:

① Distraction-Free Layout:
Hides navigation bars and scrollbars with fluid typography responsive scaling.

② Dark / Light Themes:
Supports celestial dark mode and crisp light mode for high-contrast visibility under stage lighting.

Question 6

When users across different timezones open the same link, is the countdown synchronized?

Accepted Answer

Strict absolute UTC synchronization:

① Universal Anchor:
Shareable URLs carry an exact ISO 8601 UTC timestamp.

② Timezone Agnostic:
Whether viewers reside in Tokyo, London, or Los Angeles, all timers hit zero at the exact same physical instant.

Question 7

Does the timer maintain drift-free precision when running in background tabs or asleep devices?

Accepted Answer

Protected against browser throttle drift:

① System Epoch Diffing:
Rather than incrementally accumulating `setInterval` ticks, each tick recalculates against absolute system clock deltas.

② Wakeup Calibration:
Waking a device instantly resyncs the display to the exact current millisecond.

Target Countdown Timer

Set Target Event & Time

Frequently Asked Questions (FAQ)7 Q&As