Our concept of time, as experienced in everyday life, is not directly dependent on time dilation caused by the rotation or orbit of the Earth. The effects of time dilation due to Earth's rotation and orbital motion are extremely small and generally not noticeable on a human timescale.
However, it is true that various factors can introduce small deviations in the measurement of time due to Earth's motion. These deviations are taken into account in highly precise scientific measurements, such as those made by atomic clocks.
Time Dilation due to Earth's Rotation: Earth's rotation causes a slight time dilation effect due to the difference in velocity between points on the Earth's surface and the rotation axis. Points closer to the equator experience slightly greater velocity than points near the poles. As a result, clocks at higher latitudes run slightly faster than clocks at lower latitudes.
Time Dilation due to Earth's Orbit: Earth's orbital motion around the Sun also induces a minor time dilation effect. When Earth is closer to the Sun during its orbit, it moves slightly faster, leading to a small time dilation effect compared to when it is farther away.
These effects are well understood and have been measured with high precision. However, their impact on our daily lives or standard timekeeping systems is negligible. They are typically accounted for in scientific experiments, satellite-based navigation systems like GPS, and other applications that require highly accurate time measurements.
The magnitude of the time dilation effects caused by Earth's rotation and orbit is quite small. The time dilation due to Earth's rotation is on the order of microseconds (millionths of a second) per day, while the time dilation due to Earth's orbit is even smaller. These differences are well below the level of human perception and do not significantly affect our everyday experiences of time.
In summary, while Earth's rotation and orbit do introduce minor time dilation effects, they are too small to have a noticeable impact on our subjective experience of time or our conventional timekeeping systems.