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 29 FAX 33 (0) 1 40 51 22 91 Internet: services.iers@obspm.fr Paris, 16 July 2013 Bulletin D 116 ANNOUNCEMENT OF DUT1 From the 22 August 2013, 0h UTC until further notice, the value of DUT1 to be disseminated with the time signals will be DUT1 = 0.0 s Bulletin D 117 should be issued in October 2013