BUG: Stopwatch / Timer are dependent on time of day clock. Therefore changing the time will affect your timer.

[wozmatic]

If the clock changes the time of day, manually or daylight savings time, it will affect your stopwatch / timer.

So if your clock is set to 1:00pm and you start a stopwatch, then after 1 minute you change the time to 1:30pm, your stopwatch will say 30 min, instead it should be 1 minute.

Same thing with timers, if you set a 15 minute timer at 1:00pm and change clock to 1:30pm that timer will be gone.

A fix would be making the stopwatch / timer independent of the time of day clock

 

[MacCheetah3]

It’s not a bug rather how time duration is typically handled programmatically. I do not know the reason but it’s the same on Android — don’t recall if also in Windows. The timer function doesn’t actually just start counting up from zero. Rather it saves the current time in millisecond format. When a display update is requested, including when the timer stops, the current time in ms is again saved. Finally, the function subtracts the initial ms timestamp from the later and formats accordingly.

Basically: end timestamp - start timestamp = duration