This calendar lists key dates relevant to the work of humanitarian disarmament. For more information on these and other disarmament events, see the calendars hosted by the UN Office of Disarmament Affairs and Reaching Critical Will.
2020
| February 4- 7 | Arms Trade Treaty, Working Groups and First Informal Preparatory Meeting for the Sixth Conference of States Parties (CSP6), Geneva |
| February 10 | Second round of consultations on a political declaration on the use of explosive weapons in populated areas, Geneva |
| February 11-14 | Twenty-Third International Meeting of National Mine Action Programme Directors and United Nations Advisers, Geneva |
| February 14-15 | International Campaign to Abolish Nuclear Weapons (ICAN), Paris Forum, Paris |
| February 26-28 | Campaign to Stop Killer Robots, Global Campaigners Meeting, Buenos Aires |
| March 23-24, 26-27 | Third round of consultations on a political declaration on the use of explosive weapons in populated areas, Geneva (postponed) |
| April 4 | International Day for Mine Awareness and Assistance in Mine Action |
| April 14-17 | Arms Trade Treaty, Working Groups and Second Informal Preparatory Meeting for CSP6, Geneva (cancelled) |
| April 27-May 22 | Nuclear Non-Proliferation Treaty, Review Conference, New York (postponed) |
| June 8 | Convention on Cluster Munitions, Virtual Briefing by Second Review Conference president (online) |
| June 17 | Convention on Conventional Weapons (CCW) Protocol V on Explosive Remnants of War, Meeting of Experts (postponed) |
| June 18-19 | CCW Amended Protocol II, Group of Experts (postponed) |
| June 22-26 | CCW Group of Governmental Experts on lethal autonomous weapons systems (first session) (postponed) |
| June 29 | Convention on Cluster Munitions, First Preparatory Meeting for Second Review Conference |
| June 30 – July 2 | Mine Ban Treaty, Intersessional Meetings (online) |
| August 1 | Tenth anniversary of entry into force of the Convention on Cluster Munitions |
| August 10-14 | CCW Group of Governmental Experts on lethal autonomous weapons systems (first session), Geneva (postponed) |
| August 17- 21 | Arms Trade Treaty, Sixth Conference of States Parties, by written procedure |
| August 29 | International Day against Nuclear Tests |
| September 4 | Convention on Cluster Munitions, Second Preparatory Meeting for Second Review Conference, Geneva |
| September 7 | Protecting Civilians in Urban Areas, Explosive Weapons in Populated Areas: Issues, Policy and Practice, online panel |
| September 21-25 | CCW Group of Governmental Experts on lethal autonomous weapons systems (first session), Geneva |
| September 26 | International Day for the Total Elimination of Nuclear Weapons |
| September 28 | CCW Protocol V on Explosive Remnants of War, Meeting of Experts, Geneva |
| September 29-30 | CCW Amended Protocol II, Group of Experts, Geneva |
| October 5-November 5 | UN General Assembly (UNGA) First Committee on Disarmament and International Security, New York |
| October 19-21 | Humanitarian Disarmament Forum, New York |
| November 2-6 | CCW Group of Governmental Experts on lethal autonomous weapons systems (second session), Geneva |
| November 9 | CCW Protocol V, Fourteenth Conference of High Contracting Parties, Geneva |
| November 10 | CCW Amended Protocol II, Twenty-Second Conference of High Contracting Parties, Geneva |
| November 11-13 | CCW, Meeting of High Contracting Parties, Geneva |
| November 16-20 | Mine Ban Treaty, Eighteenth Meeting of States Parties, Geneva |
| November 23-27 | Convention on Cluster Munitions, Second Review Conference, Lausanne |
| December 1 | Deadline for comment on International Law Commission’s Draft Principles on the Protection of the Environment in Relation to Armed Conflict |