| 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 - 11 Jan | WG I - AR6 Second Lead Author Meeting (Vancouver, Canada) | |
| 21 Jan - 25 Jan | WG II - AR6 First Lead Author Meeting (Durban, South Africa) | More information |
| 28 Jan - 24 Mar | Final Government distribution - Government review of MR (organized by TFI) | More information |
| 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) | More information |
| 3 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) | More information |
| 18 Mar - 19 Mar | 56th Session of the IPCC Bureau (Geneva, Switzerland) | Bureau Portal Login |
| 1 Apr - 5 Apr | WG III - AR6 First Lead Author Meeting (Edinburgh, Scotland) | More information |
| 29 Apr - 23 Jun | Final Government distribution - Government review of SPM (SRCCL) (organized by WG III) | |
| 29 Apr - 23 Jun | Expert Review of First Order Draft of WG I - AR6- (organized by WG I) | More information |
| 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 Consideration of the 2019 Refinement (Kyoto, Japan ) | Documents and Information for participants |
| 14 Jun - 9 Aug | Final Government distribution - Government Review of SPM (SROCC) | |
| 14 Jul - 19 Jul | WG II - AR6 Second Lead Author Meeting (Kathmandu, Nepal) | |
| 30 Jul - 31 Jul | WG I/II/III - Preparatory Meeting of the Drafting Authors for Special Report on Climate Change and Land (organized by WG III) (Geneva, Switzerland) | |
| 2 Aug - 6 Aug | 50th Session of the IPCC (Geneva, Switzerland) Consideration of the Special Report on Climate Change and Land | Documents and Information for participants |
| 26 Aug - 30 Aug | 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 (Principality of Monaco, Monaco) | |
| 20 Sep - 23 Sep | 51st Session of the IPCC (Principality of Monaco, Monaco ) Consideration of the Special Report on the Ocean and Cryosphere in a Changing Climate | Documents and Information for participants |
| 30 Sep - 4 Oct | WG III - AR6 Second Lead Author Meeting (New Delhi, India) | |
| 15 Oct - 17 Oct | Use of the 2006 IPCC Guidelines for National Greenhouse Gas Inventories - IPCC Expert Meeting to collect EFDB and Software users’ feedback (Hayama, Japan ) | |
| 18 Oct - 13 Dec | Expert Review of First Order Draft of WGII-AR6 - (organized by WG II) | |
| 21 Oct - 23 Oct | SYR AR6 Scoping Meeting - (Singapore) | More information |
| 24 Oct - 25 Oct | 57th Session of the IPCC Bureau (Singapore) | |
| 11 Nov - 14 Nov | 17th Editorial Board Meeting for the IPCC Emission Factor Database (EB17) (Osaka, Japan) | |
| 12 Nov - 13 Nov | 17th Expert Meeting on Data for the IPCC Emission Factor Database (DM17) (Osaka,, Japan) | |
| 15 Nov | Thirty-first Meeting of the Bureau of the IPCC Task Force on National Greenhouse Gas Inventories (TFB31) (Osaka,, Japan) |
| 13 Jan - 8 Mar | WGIII - AR6 Expert Review of First Order Draft | |
| 27 Jan - 1 Feb | WG II - AR6 Third Lead Author Meeting (LAM3) (Faro, Portugal) | |
| 24 Feb - 1 Mar (TBC) | 52nd Session of the IPCC (TBC) | |
| 2 Mar - 3 Mar (TBC) | 58th Session of the IPCC Bureau (TBC) | |
| 2 Mar - 26 Apr | WGI - AR6 Expert and Government Review of the SOD and of the FOD of the Summary for Policymakers (SPM) | |
| 23 - 25 Mar | TFI - Expert Meeting on Short-Lived Climate Forcers (SLCF)(TBC) | |
| 16 Mar - 26 Apr | SYR - AR6 Selection of Core Writing Team | |
| 15 Apr - 19 Apr | WG III - AR6 Third Lead Author Meeting (Quito, Ecuador) | |
| 1 Jun - 6 Jun | WG I - AR6 Fourth Lead Author Meeting (LAM4), Location tbd | |
| 29 Jun - 1 Jul (TBC) | TFI - Expert Meeting on Short-Lived Climate Forcers (SLCF)(TBC) | |
| 13 - 15 Jul | SYR - AR6 Core Writing Team 1 (CWT-1) | |
| 13 Jul - 13 Sep | WGIII - AR6 Expert & Government Review of the SOD & the FOD of the Summary for Policymakers (SPM) | |
| 13 - 15 Jul | SYR - AR6 Core Writing Team 1 (CWT-1) | |
| 7 Aug - 2 Oct | WGII - AR6 Expert Government Review of Second Order Draft | |
| 31 Sept - 27 Oct (TBC) | SPM writing workshop (TBC) | |
| 5 Oct - 5 Oct (TBC) | 59th Session of the IPCC Bureau (TBD) | |
| 6 Oct - 10 Oct (TBC) | 53rd Session of the IPCC (TBD) | |
| 25 Oct - 31 Oct | WG III - AR6 Fourth Lead Author Meeting (LAM 4), Location tbc | |
| 2 Nov - 7 Nov | WG II - AR6 Fourth Lead Author Meeting (LAM 4), Location tbc | |
| 7 Dec - 31 Jan 2021 | WGI - AR6 Final Government Distribution |