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 22 26 FAX 33 (0) 1 40 51 22 91 Internet: services.iers@obspm.fr Paris, 16 January 2012 Bulletin D 110 ANNOUNCEMENT OF DUT1 From the 9 February 2012, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = -0.5 s Bulletin D 111 should be issued in May 2012