Question 1

How does the Pomodoro Technique actually work?

Accepted Answer

Work in one uninterrupted focus block, then take a short break. A classic cycle is 25 minutes of focus followed by a 5-minute break; after four focus blocks you take a longer rest. ClockMatrix lets you set any focus and break length, then counts each completed focus block as one session.

Question 2

Why is the countdown drift-free?

Accepted Answer

Instead of subtracting one second per tick, the timer stores an absolute end timestamp and recomputes the remainder on every frame: remaining = endAt − Date.now(). Because each readout is derived from the real clock rather than an accumulated counter, a slow or throttled browser tab can never make the timer fall behind.

Question 3

How are time zones involved in a focus timer?

Accepted Answer

A Pomodoro interval is a duration, not a wall-clock time, so it is time-zone independent. The absolute end timestamp is stored as a UTC epoch millisecond value, and the display converts it back to your local zone. That is why the same 25-minute block reads identically whether you are in UTC+00:00 or UTC+09:00.

Question 4

What is the exact formula for the remaining time?

Accepted Answer

remainingMs = max(0, endAt − now). The readout is then minutes = floor(remainingMs / 60000) and seconds = floor((remainingMs mod 60000) / 1000), each zero-padded to two digits. When remainingMs reaches 0 the phase completes and the next interval begins.

Question 5

Do leap years affect a Pomodoro timer?

Accepted Answer

No. Leap years add one day (86,400,000 ms) to the calendar year under the Gregorian rule (year mod 4 = 0 and year mod 100 ≠ 0, or year mod 400 = 0), but a focus interval is measured in minutes and seconds, so the extra day never changes a session length.

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