Latest updates from the IERS, including new messages and bulletins, announcements of meetings and workshops, and further news related to Earth rotation, reference frames, and geophysical fluids.

Date	Category	Title
15 Jan 2026	Bulletins	IERS Bulletin A (rapid EOP data and predictions) - latest issue
12 Jan 2026	Messages	IERS Message No. 547: Fourth update of the 2020 C04 solution
12 Jan 2026	Messages	IERS Message No. 546: Bias in C04 x pole coordinate (April - November 2025)
06 Jan 2026	Bulletins	IERS Bulletin C (leap second announcements) - latest issue
02 Jan 2026	Bulletins	IERS Bulletin B (monthly EOP data) - latest issue
19 Dec 2025	Messages	IERS Message No. 544: EGU 2026: Earth rotation session
19 Dec 2025	Messages	IERS Message No. 545: EGU2026 G2.5 "Precise Orbit Determination for Geodesy and Earth Science"
16 Dec 2025	Messages	IERS Message No. 543: COSPAR 2026: Genesis Session - Call for Abstracts
02 Dec 2025	Messages	IERS Message No. 542: EGU2026-G2.3 "TRF: determination, evaluation and applications"
01 Dec 2025	Messages	IERS Message No. 541: Release of DTRF2020-u2023
11 Nov 2025	Messages	IERS Message No. 540: Relaunch of the IERS Website (www.iers.org)
22 Oct 2025	Messages	IERS Message No. 539: TIGER Symposium in Geodesy 2026 - Save the date: Sep. 28 - Oct. 1, 2026
16 Oct 2025	Messages	IERS Message No. 538: REFAG2026 - Abstract Deadline Extension to Nov. 2, 2025
01 Oct 2025	Messages	IERS Message No. 537: ITRF2020-u2024 is available on line
20 Jun 2025	Bulletins	IERS Bulletin D (announcements of DUT1) - latest issue