4 ms·
You seem to assume that a day always has 24 hours. Common (but not only) non-24h day lengths are: - 23 hours - 25 hours - 24 hours 1 second - 23 hours 59 minute
by mklepaczewski 7mo ago
You seem to assume that a day always has 24 hours. Common (but not only) non-24h day lengths are:
- 23 hours
- 25 hours
- 24 hours 1 second
- 23 hours 59 minutes 59 seconds
You could assume that a day isn't exactly 24 hours, but it's close-ish to 24 hours. Nope, not even close.
And that assumes that we can treat an hour as a precise measure of time (we can't). On some systems, even a second is not a precise measure of time (second smearing).
To make things worse, those are "simple" edge cases.
Time is hard. I'm not sure if I can make any statement about time that is true.
- koakuma-chan 7mo agoI am saying that you shouldn't use day as a unit of time. You should use second, minute, hour, etc, because these have a constant duration. sleep(86400) should reliably make your thread sleep for at least 24 hours.
- mklepaczewski 7mo agoIt depends on the context and the system you’re working with. In some systems, an hour may last 3599, 3600 or 3601 seconds (due to the leap second), a minute may be 59,60 or 61 seconds. Even a second is not always a „true” second. There’s no single time unit that works for all situations.