| 29 Jan - 31 Jan | 55th Session of the IPCC Bureau (WMO, Geneva, Switzerland) | |
| 12 Feb - 16 Feb | WG I/II - Second Lead Author Meeting for Special Report on the Ocean and Cryosphere in a Changing Climate (organized by WGII) (Quito, Ecuador) | |
| 5 Mar - 7 Mar | Cities and Climate Change Science Conference (Edmonton, Alberta, Canada) | Cities Website |
| 13 Mar - 16 Mar | 47th Session of the IPCC (Paris, France) | |
| 25 Mar - 30 Mar | WG I/II/III - Second Lead Author Meeting on Climate Change and Land: an IPCC special report on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems. (organized by WG III) (Christchurch, New Zealand) | |
| 9 Apr - 9 Apr | TFI - Third Lead Author Meeting for the Elaboration of the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Coordinating Lead Author, Review Editor, Steering Group Meeting (Cairns, Australia) | |
| 9 Apr - 13 Apr | WG I/II/III - Fourth Lead Author Meeting on SR15 (organized by WG I) (Gaborone, Botswana) | |
| 10 Apr - 13 Apr | TFI - Third Lead Author Meeting for the Elaboration of the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories (Cairns, Australia) | |
| 16 May - 18 May | WG I - Expert Meeting on Regional Assessment (Trieste, Italy) | |
| 28 May - 31 May | TFI / WGI - Expert Meeting on Short-lived Climate Forcers (SLCF) (Geneva, Switzerland ) | |
| 25 Jun - 29 Jun | WG I - AR6 1st Lead Author Meeting (Guangzhou, China) | |
| 23 Jul - 27 Jul | WG I/II - Third Lead Author Meeting for Special Report on the Ocean and Cryosphere in a Changing Climate (organized by WGII) (Lanzhou, China ) | |
| 31 Jul - 2 Aug | TFI - Use of the 2006 IPCC Guidelines for National Greenhouse Gas Inventories - IPCC Expert Meeting to collect EFDB and Software users' feedback: Review of IPCC Inventory Software Implementation of Tier 2 for Agriculture: Livestock Categories (3A) and Relevant 3C Categories (Hayama, Japan) | |
| 3 Sep - 7 Sep | WG I/II/III - Third Lead Author Meeting on Climate Change and Land: an IPCC special report on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems. (organized by WG III) (Dublin, Ireland) | |
| 28 Sep - 29 Sep | WG I/II/III - Preparatory Meeting of the Drafting Authors on SR15 (organized by WG I) (Incheon, Republic of Korea) | |
| 1 Oct - 5 Oct | 48th Session of the IPCC (Incheon, Republic of Korea ) | |
| 21 Oct - 21 Oct | TFI - Fourth Lead Author Meeting for the Elaboration of the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Coordinating Lead Author, Review Editor, Steering Group Meeting (Rome, Italy) | |
| 22 Oct - 26 Oct | TFI - Fourth Lead Author Meeting for the Elaboration of the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories (Rome, Italy) | |
| 27 Oct - 27 Oct | TFI - Thirtieth Meeting of the Bureau of the IPCC Task Force on National Greenhouse Gas Inventories (Rome, Italy) | |
| 13 Nov - 16 Nov | TFI - 16th Editorial Board Meeting for the IPCC Emission Factor Database (EFDB) (Buenos Aires, Argentina) | |
| 14 Nov - 15 Nov | TFI - 16th Expert Meeting on Data (Land Use, Land-Use Change and Forestry (LULUCF) Sector, Waste Sector) for the IPCC Emission Factor Database (EFDB) (Buenos Aires, Argentina) | |
| 19 Nov - 14 Jan | Expert and Government review of Second Order Draft - SRCCL (organized by WG III) |
| 7 Jan - 13 Jan | WG I - AR6 Second Lead Author Meeting (Vancouver, Canada) | |
| 21 Jan - 25 Jan | WG II - AR6 First Lead Author Meeting (Durban, South Africa) | |
| 11 Feb - 15 Feb | WG I/II/III - Fourth Lead Author Meeting on Climate Change and Land: an IPCC special report on climate change, desertification, land degradation, sustainable land management, food security, and greenhouse gas fluxes in terrestrial ecosystems. (organized by WG III) (Cali, Colombia) | |
| 4 Mar - 9 Mar | WG I/II - Fourth Lead Author Meeting for Special Report on the Ocean and Cryosphere in a Changing Climate (organized by WGII) (Kazan, Russian Federation) | |
| 18 Mar - 19 Mar | 56th Session of the IPCC Bureau (Geneva, Switzerland) | |
| 1 Apr - 5 Apr | WG III - AR6 First Lead Author Meeting (Edinburgh, Scotland) | |
| 29 Apr - 23 Jun | Final Government distribution - SRCCL (organized by WG III) | |
| 6 May - 7 May | TFI - Preparatory Meeting of the Drafting Authors for the Elaboration of the 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories (Kyoto, Japan) | |
| 8 May - 12 May | 49th Session of the IPCC (Kyoto, Japan ) | |
| 14 Jul - 19 Jul | WG II - AR6 Second Lead Author Meeting (Kathmandu, Nepal) | |
| 2 Aug - 6 Aug (TBC) | 50th Session of the IPCC (TBD) | |
| 26 Aug - 1 Sep | WG I - AR6 Third Lead Author Meeting (Toulouse, France) | |
| 17 Sep - 18 Sep | WG I/II - Preparatory Meeting of the Drafting Authors for Special Report on the Ocean and Cryosphere in a Changing Climate (organized by WGII) (Principality of Monaco, Monaco) | |
| 19 Sep - 19 Sep | Preparatory Meeting ahead of the Plenary Session (Municipality of Monaco, Monaco) | |
| 20 Sep - 23 Sep | 51st Session of the IPCC (Principality of Monaco, Monaco ) | |
| 30 Sep - 6 Oct | WG III - AR6 Second Lead Author Meeting (TBD) |
| 27 Jan - 31 Jan | WG II - AR6 Third Lead Author Meeting (TBD) | |
| 30 Mar - 3 Apr | WG III - AR6 Third Lead Author Meeting (TBD) | |
| 4 May - 4 May (TBC) | 60th Session of the IPCC Bureau (TBD) | |
| 5 May - 9 May (TBC) | 52nd Session of the IPCC (TBD) | |
| 1 Jun - 5 Jun | WG I - AR6 Fourth Lead Author Meeting (TBD) | |
| 31 Aug - 4 Sep | SYR - Core Writing Team (CWT-2) Meeting for the AR6 (TBD) | |
| 5 Oct - 5 Oct (TBC) | 61st Session of the IPCC Bureau (TBD) | |
| 6 Oct - 10 Oct (TBC) | 53rd Session of the IPCC (TBD) | |
| 19 Oct - 23 Oct | WG III - AR6 Fourth Lead Author Meeting (TBD) | |
| 2 Nov - 6 Nov | WG II - AR6 Fourth Lead Author Meeting (TBD) |