International Day of Climate Action: 24 October anniversary 2026

What happened on 24 October 2009?

350.org’s account of its first day of action describes more than 5,000 events in 181 countries. The campaign brought people together around climate action ahead of that year’s international climate negotiations.

The name 350 refers to a campaigning target for atmospheric carbon dioxide concentration, expressed in parts per million. It should be attributed to the movement’s rationale rather than presented as a simple boundary below which every climate risk disappears. See 350.org’s history for its explanation of the name and early campaigns.

Is there an official 2026 event?

The historical sources establish the 2009 mobilisation. They do not by themselves confirm an annual event schedule, registration process or theme for 2026. Check 350.org’s current campaigns or the organisation hosting a particular local activity before making travel plans or advertising it as an official event.

You can still use the anniversary as a prompt for learning or a community project. Describe your own activity clearly, including its organiser, purpose, date and any costs.

Plan a focused climate discussion

The following is an original activity suggestion. It can work for a class, community group or workplace without claiming affiliation with a campaign.

1. Choose one local question. For example, ask what options exist for reducing unnecessary energy use in a shared building.
2. Gather relevant information. Find out who manages the building, what decisions have already been made and which information is available to the group.
3. Compare feasible actions. Discuss cost, accessibility, responsibilities and any permission needed. Avoid assuming everyone can spend money or change their travel arrangements.
4. Agree one next step. This could be asking the building manager a specific question or arranging a more detailed review.
5. Set a follow-up date. Record what happened rather than counting the meeting itself as a completed environmental improvement.

Sharing climate information responsibly

Give any statistic a source and date, and explain what it measures. A historical campaign total should remain labelled as historical. A national figure should not be described as a measurement of your own organisation.

When promoting an activity, separate the learning goal from any fundraising appeal. Name the beneficiary and use its authorised donation arrangements. Obtain permission before using photographs of participants.