Has it been longer or shorter in the past?
And how could that effect the Earth and life on it?
We learn that an 'Earth Day' is 24 hours long, and that more precisely it is 23 hours 56 minutes and 4 seconds long. But this hasn't always been the case.
Detailed studies of fossil shells, and the banded deposits in certain sandstones, reveal a much different length of day in past eras! These bands in sedimentation and shell-growth follow the
lunar month and have individual bands representing the number of days in a lunar month. By counting the number of bands, geologists can work out the number of days in a year, and from this the number of hours in a day when the shell was grown, or the deposits put down.
Earth’s Rotation Changes and the Length of the Day | NASA (link to PDF)
Immanuel Velikovsky, in his Worlds in Collision book, asked questions about the harmonious celestial state and if it had always been the same? Science theory is suggesting more and more chaotic conditions and events to the planets in our solar system.
But what of the Earth? Have there been changes to our planet? One piece of evidence would be the length of the Earth's day and if it has got shorter or longer over time.
The sun rises in the east and sets in the west. The day consists of twenty-four hours. The year consists of 365 days, 5 hours, and 49 minutes. The moon circles around the earth, changing its phases-crescent, full, decrescent. The terrestrial axis points in the direction of the polar star. After winter comes spring, then summer and fall. These are common facts. Are they invariable laws? Must it be so forever? Was it so always?
Immanuel Velikovsky quote from Worlds in Collision
there were a minimum of 410 days per year in the late Proterozoic with our extrapolations varying between 410 and 485
STROMATOLITES AND EARTH--SUN--MOON DYNAMICS (link to PDF)
With the help of paleontologist Neil Shubin, reporter Emily Graslie and the Field Museum's Paul Mayer we discover that our world is full of ancient coral calendars. Each one of these sea skeletons reveals that once upon a very-long-time-ago, years were shorter by over forty days.
The Times They Are a-Changin' | Radio Lab
Day to day changes for planet Earth
Changes in the planets length of day may reflect a change in its orbit or how fast it rotates. This would have an impact on the Earth's environment.
Could changes in the how long Earth's day and night lasts change or show that there would be changes in the weather and seasons?
Could a shorter or longer day length be a sign a environmental change or catastrophe?
The thicker atmosphere and stronger coriolis effect due to Earth's faster rotation (a day lasted for 22.4 hours in early Carboniferous) created significantly stronger winds than today.
Climate and weather - Carboniferous | Wikipedia
For more than a century scientists have known that Earth's ice ages are caused by the wobbling of the planet's orbit, which changes its orientation to the sun and affects the amount of sunlight reaching higher latitudes, particularly the polar regions ... Earth's orbit changes on the scale of thousands of years
Other forces also change the planet's spin. Since Earth formed, tugging from the sun and moon have slowed the planet's rotation. On shorter time scales, earthquakes, melting glaciers, ocean currents and strong winds, such as the jet stream, can alter how fast the planet spins, shortening or lengthening a day by about 1 millisecond.
Earth orbit changes key to Antarctic warming that ended last ice age | Phys org
According to Mach’s principle the inertia of an object is not a mere property of the object but depends on how much matter around the object. This means that the distant universe would affect this property. Owing to this, we would expect a slight change in the strength of gravity with time. This change should affect the Earth-Moon-Sun motion. From coral fossil data approximately 400 million years (m.y.) ago, it has been estimated that there were little over 400 days in a year at that time. It is also observed that the Moon shows an anomalous acceleration.
The Length of the Day: A Cosmological Perspective (link to PDF)
Worlds in Collision investigation
This article is part of a Velikovsky Worlds in Collision review/investigation to see how his ideas have stood the test of time compared to modern science theories and also the modern Electric Universe theory, plasma mythology, chronology revision and Saturnian Configuration theory.