| Date | Org | Activity | City | Contact |
| 7 Sep | UN | International Day of Clean Air for Blue Skies [UNEP] | ||
| 7 Sep | WMO | WMO Air Quality and Climate Bulletin released for International Day of Clean Air for Blue Skies. NB Will be released ahead of the actual day, on 4 September. | Geneva | Clare Nullis Tel +41797091397 |
| 7 Sep | UNIDIR | Understanding thermobaric weapons: Technological capacities and governance frameworks Exploring what thermobaric weapons are, what threats they pose to civilians, how they are regulated, and their future trajectory. | Virtual | unidir.comms@un.org |
| 7 Sep | ILO | Special session of ILO Governing Body | Geneva | NEWSROOM@ilo.org |
7 Sep 7 Oct | HRC | 63rd regular session of the UN Human Rights Council | Geneva | media-humanrightscouncil@un.org |
| 8 Sep | UN | International Literacy Day [UNESCO] | ||
| 8 Sep | HRC | Press Conference at 2 p.m. UN Human Rights Council – Investigative Bodies Subject: Update on the human rights situation in Syria by the Independent International Commission of Inquiry on the Syrian Arab Republic Speakers:
| Hybrid | Todd Pitman +41 (0)76 691 1761 |
| 8-9 Sep | UNIDIR | Outer Space Security Conference 2026 Explores technical, legal and policy options to strengthen security and sustainability in space. | Hybrid | unidir.comms@un.org |
| 8-9 Sep | UNECE | Geneva | Jean-Isaias Rodriguez +41 79 444 5081 | |
| 9 Sep | UN | International Day to Protect Education from Attack | ||
| 9-11 Sep | ILO | Night annual conference of the International Network on Digital Labour on AI Supply Chains | Geneva | NEWSROOM@ilo.org |
| 12 Sep | UN | United Nations Day for South-South Cooperation | ||
| 14 Sep | WTO | Embargoed press conference on the 2026 World Trade Report | Geneva | jessica.hermosa@wto.org |
| 14 Sep | WTO | World Trade & Tech Day | Geneva | jessica.hermosa@wto.org |
| 14-18 Sep | UNECE | Working Party on Automated/Autonomous and Connected Vehicles | Geneva | Jean-Isaias Rodriguez +41 79 444 5081 |
| 15 Sep | UN | International Day of Democracy | ||
| 15-17 Sep | WTO | WTO Public Forum | Geneva | brian.walker@wto.org |
| 16 Sep | UN | International Day for the Preservation of the Ozone Layer International Day for Interventional Cardiology International Day of Science, Technology and Innovation for the South | ||
| 16 Sep | WMO | WMO Ozone Bulletin – for World Ozone Day. | Geneva | Clare Nullis Tel +41797091397 |
| 16-17 Sep | ILO | Annual Forum of the Global Coalition for Social Justice | Geneva | NEWSROOM@ilo.org |
| 17 Sep | WMO | WMO State of Global Water Resources 2025 report. Press conference with WMO Secretary-General Celeste Saulo. Materials under embargo. | Geneva | Clare Nullis Tel +41797091397 |
| 17 Sep | UN | World Patient Safety Day [WHO] | ||
| 18 Sep | UN | |||
| 20 Sep | UN | |||
| 21 Sep | UN |
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