• Q1 2021: open call for participation in Working Group via IERS message – IERS Message No. 425 (24 March 2021)
• Q1 2021: first online meeting of the Working Group (6 May 2021)
• Q2 2021: definition of the validation protocol
• Q2 2021: website of EOP PCC online
• – technical document summarizing all the rules and requirements (2 June 2021)
• – open the server for ID applications (7 June 2021)
• – open the server for preliminary submissions of predictions for testing purposes (7 June 2021)
• Q2 2021: open call for participation in pre-operational phase of the 2^nd EOP PCC (3 June 2021)
• Q2 2021: first weekly submission of test EOP predictions (9 June 2021)
• Q3 2021: poster about preparations for the 2^nd EOP PCC presented during the IAG Scientific Assembly (1 July 2021)
• Q3 2021: open call for participation in operational phase of Campaign via IERS message – IERS Message No. 437 (13 July 2021)
• Q3 2021: first weekly submission of EOP predictions (1 September 2021)
• Q4 2021: preliminary results presented during ICCC JWG C.1 Meeting (25 November 2021)
• Q4 2021: call for participation in the 2^nd EOP PCC Workshop No. 1 – IERS Message No. 443 (10 December 2021)
• Q4 2021: poster with campaign overview and first results presented during AGU Fall Meeting (16 December 2021)
• Q1 2022: 2^nd EOP PCC Workshop No. 1 (15-16 February 2022)
• Q2 2022: presentation of preliminary results at EGU General Assembly (25 May 2022)
• Q4 2022: annual summary of the 2^nd EOP PCC presented during REFAG 2022 (18 October 2022)
• Q4 2022: online meeting with Participants and Working Group Members (8 December 2022)
• Q4 2022: poster with initial summary of the course of the 2nd EOP PCC presented during AGU Fall Meeting (13 December 2022)
• Q4 2022: last weekly submission of EOP predictions in operational phase (29 December 2022)
• Q1 2023: call for participation in the 2^nd EOP PCC Workshop No 2. – IERS Message No. 468 (13 January 2023)
• Q1 2023: 2^nd EOP PCC Workshop No. 2