4 ms·UNIX time double-counts leap seconds. UTC: 58, 59, 60, 00, 01 UNIX: 58, 59, 00, 00, 01by SAI_Peregrinus 3y agoUNIX time double-counts leap seconds. UTC: 58, 59, 60, 00, 01 UNIX: 58, 59, 00, 00, 01