https://www.vice.com/en_us/article/y3pp57/earth-just-mysteriously-spun-faster-causing-shortest-day-ever-recorded

Earth logged its shortest day in decades on June 29 when it completed one spin at just 1.59 milliseconds short of 24 hours, which is the fastest time recorded since atomic clocks began tracking our planet’s rotation in the 1960s, according to the website timeanddate.com.

The new record offers more proof that Earth is rotating faster in recent years, though the exact reason for this slight acceleration is a mystery. The planet has broken its own speed record more than two dozen times since 2020, reversing an earlier decades-long run of slightly longer days.