The International Earth Rotation and Reference System, announced Tuesday a "leap second" will be added to account for a discrepancy between the Earth's rotation and the atomic clock. 1 second will be added tonight at midnight. Time to synchronize my watch.
https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat
https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat