<ul data-eligibleForWebStory="false">Earth has been spinning more quickly in recent years, with days being a millisecond shorter than others.Since 2020, Earth has experienced unprecedentedly short days around July and August, as recorded by atomic clocks.The reason for Earth's accelerated spin is uncertain, with factors such as the moon's orbit affecting variations in the length of the day.Scientific predictions suggest that Earth may eventually decelerate, but the exact cause of the recent acceleration remains unknown.