4 ms·
This is only true if you have no idea of how many milliseconds are in a day. On the other hand, it IS very close to a day, which is neat. But it's not exactly
by MPSimmons 9y ago
This is only true if you have no idea of how many milliseconds are in a day.
On the other hand, it IS very close to a day, which is neat.
But it's not exactly a day. Within a few miliseconds, days drift quite a bit because of shifts in the center of gravity and the moment of inertia.
The Three Gorges Dam and the Boxing Day quake both measurably changed the rate of the Earth's spin.
- hanbura 9y agoIt is exactly the length of a civil day in TAI (International Atomic Time). It also happens to match almost all civil days in UTC-derived timezones (with the exception of leap seconds, daylight savings, and timezones switching to a different UTC offset) It doesn't match solar days, but most people don't actually use solar days.