Yeah, I was trying to come up with a way to address the parent comment’s first slight inaccuracy — that the revolution period (year timescale) of our planet is being slowly changed by some other force. It’s essentially not.

Or, stated another way, anything that could account for that large of time variation in our year over that short of a time period... imagine ocean tides but with the Earth’s mantle instead. Then we’re not here to have this debate.

For all practical purposes, the rotational period of the earth around the sun can be considered a constant.