Another first has happened: Bulletin D141 at [https://datacenter.iers.org/data/latestVersion/17_BULLETIN_D17.txt] specifies that DUT1 jumps from -0.2 s to -0.1 s on 2021-07-21T00Z. This is the first time ever (since 1972) that the approximation UTC + DUT1 of UT1 makes a jump upwards (is advanced). Michael Deckers.