Melting ice slows Earth's rotation and could affect time measurement. Taking into account the phenomenon caused by global warming, we should remove a second from our clocks in 2029.
For nine years, the Earth has also tended to rotate a little more quickly, shortening our days. June 29, 2022 was thus the shortest ever recorded: 24 hours minus 1.59 milliseconds. The change is thought to be the result of interactions between the Earth's fluid core and its mantle. The Earth does not really take 365 days to revolve around the Sun, but 365.2425.