INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE DE LA ROTATION TERRESTRE OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. 33 (0) 1 40 51 23 35 FAX 33 (0) 1 40 51 22 91 Internet: services.iers@obspm.fr Paris, 19 February 2016 Bulletin D 128 ANNOUNCEMENT OF DUT1 From the 24 March 2016, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = -0.1 s Bulletin D 129 should be issued in June 2016