No leap second 2026-06-30, per below. See attached patch. -- Tim Parenti
---------- Forwarded message --------- From: IERS EOP Product Center <[email protected]> Date: Tue, 6 Jan 2026 at 06:50 Subject: Bulletin C number 71 To: <[email protected]> INTERNATIONAL EARTH ROTATION AND REFERENCE SYSTEMS SERVICE (IERS) SERVICE INTERNATIONAL DE LA ROTATION TERRESTRE ET DES SYSTEMES DE REFERENCE SERVICE DE LA ROTATION TERRESTRE DE L'IERS OBSERVATOIRE DE PARIS 61, Av. de l'Observatoire 75014 PARIS (France) Tel. : +33 1 40 51 23 35 e-mail : [email protected] http://hpiers.obspm.fr/eop-pc Paris, 06 January 2026 Bulletin C 71 To authorities responsible for the measurement and distribution of time INFORMATION ON UTC - TAI NO leap second will be introduced at the end of June 2026. The difference between Coordinated Universal Time UTC and the International Atomic Time TAI is : from 2017 January 1, 0h UTC, until further notice : UTC-TAI = -37 s Leap seconds can be introduced in UTC at the end of the months of December or June, depending on the evolution of UT1-TAI. Bulletin C is mailed every six months, either to announce a time step in UTC, or to confirm that there will be no time step at the next possible date. Christian BIZOUARD Director Earth Orientation Center of IERS Observatoire de Paris, France
From c9cd070075a531bedd757d1c90d532bd2851b2fd Mon Sep 17 00:00:00 2001 From: Tim Parenti <[email protected]> Date: Tue, 6 Jan 2026 10:23:51 -0500 Subject: No leap second on 2026-06-30 Per IERS Bulletin C 71 (2026-01-06). https://hpiers.obspm.fr/iers/bul/bulc/bulletinc.71 * leap-seconds.list: Update file from IERS, retrieved from https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list --- leap-seconds.list | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/leap-seconds.list b/leap-seconds.list index 649a22c..0a11184 100644 --- a/leap-seconds.list +++ b/leap-seconds.list @@ -60,15 +60,15 @@ # # The following line shows the last update of this file in NTP timestamp: # -#$ 3960835200 +#$ 3976686858 # # 2) Expiration date of the file given on a semi-annual basis: last June or last December # -# File expires on 28 June 2026 +# File expires on 28 December 2026 # # Expire date in NTP timestamp: # -#@ 3991593600 +#@ 4007404800 # # # LIST OF LEAP SECONDS @@ -117,4 +117,4 @@ # please see the readme file in the 'source' directory : # https://hpiers.obspm.fr/iers/bul/bulc/ntp/sources/README # -#h 49db2447 571e5e1b 2f002a53 9c8da8e4 39b8e49e +#h 2e101270 4e6749f8 2f1792b7 14a0c188 36bb19d6 -- 2.50.1 (Apple Git-155)
