Did earth ever have a 25 hour day. I find when I am on an unstructured vacation time, I shift to a 25 hour day— getting up an hour later each day.
We call that sleeping in.
The so-called circadian rhythm has been shown to be regulated by day length, IOW, without help, as with the Rhythm Method, we can't keep a beat. :^)
The 2004 topic I linked up there somewhere is the one to read, but it's not exactly pertinent because that antedates humanity. One of the old calendars (in use for a good long while) had months of exactly 30 days, and year length exactly 360 days long. That suggests a slower spin rate (about 98 percent of current) for the Earth -- the day would last a bit longer, and there would be fewer of them during orbit around the Sun; similarly, the Moon going at the same rate would take a little longer to "catch up with".