If Earth's rotational speed decreased by 25%, then it would take 25% longer to rotate once.
-- A full cycle of day and night would take (1.25) x (24 hours) = 30 hours.
-- The average length of daylight/darkness over a whole year would be 15 hours each.
-- Daytime-high temperatures would be hotter everywhere, because the sun would be up longer. Night-time-low temperatures would be colder, because the sun would stay down longer.
-- Changes in the weather would be more drastic, and winds would generally be stronger, because of the greater contrast between warm areas and cold areas. BUT ...
-- High-pressure areas, low-pressure areas, hurricanes, typhoons, tornadoes, water going down the drain, dust devils, and Foucault pendulums, would all spin slower, because of the decrease in the Coriolis force.
-- There would be only 292 days in a year.
-- Every star in the sky would rise almost 5 minutes later each night than it rose the night before.
-- On the average, the moon would rise every day 61 minutes later than it rose the day before. Once the moon rose, it would be in the sky for about 16 hours before it crossed the sky and set on the other side.
-- From one Full Moon to the next one would be only about 23.6 days.
-- Each crescent and gibbous moon phase would last only about 5.9 days, instead of about a week as it does now.
-- When you went to bed, you could stay there and veg out for 10 hours. But don't get excited yet ... Once you got out of bed, you couldn't go back for another 20 hours !
-- Instead of waking up hungry and crying to be fed 3 times during the night, newborn babies would do it 4 times every night. New mothers wouldn't like it at all.
-- The standard work day and the standard school day would probably each grow to 10 hours instead of 8 hours. Bummer.
