Great Big Green Week 2026 runs from Saturday 6 June to Sunday 14 June. It is the largest community-led celebration of climate action and nature on the island of Ireland and across the United Kingdom — and with five days remaining, there is still time to take part.
The week is coordinated by The Climate Coalition and takes place for the sixth consecutive year in 2026. In 2025, more than one million people participated — attending events, organising activities and taking visible action in their communities on climate change and nature. The 2026 edition is targeting even greater participation, with the theme Together for Good framing the week's message: that individual and community action, taken collectively, constitutes a genuine and growing movement.
What the Week Is
Great Big Green Week is not a conference. It is not a policy summit. It is not an event for sustainability professionals or climate specialists.
It is, deliberately, a week of practical, participatory, locally rooted action — designed to make climate and nature engagement visible, accessible and normal for everyone.
Events taking place across Ireland and the UK this week include community clean-ups, guided nature walks, repair cafés where broken items are fixed rather than discarded, tree planting sessions, orchard days, renewable energy information workshops, film screenings, local food markets and advocacy events calling on politicians and decision-makers to act with greater urgency on climate policy.
The scope is intentionally broad. Whether someone plants a native tree in their garden, joins a beach clean-up or attends a workshop on home energy retrofitting, each action is part of the same collective statement: that communities across Ireland care about their local environment and expect their decision-makers to match that care with policy.
Ireland's Week
Across Ireland, Great Big Green Week 2026 is taking place in towns and communities nationwide, with events ranging from county council-supported clean-up days to school-based biodiversity projects and business sustainability workshops.
Dublin-based life sciences and AI company Nuritas launched a dedicated Green Week programme — Nuritas Green Week — in support of the national campaign, running internal sustainability initiatives and employee engagement events focused on environmental action. The company, whose science platform unlocks bioactive peptides from plant sources, noted the deep connection between its work and the principles behind Great Big Green Week.
Ireland's involvement in Great Big Green Week sits within a broader national context of accelerating climate action. The country is currently implementing its Climate Action Plan, expanding its home energy retrofit programme — applications for which were up 96 per cent in Q1 2026 compared to the same period last year — and transitioning its electricity grid toward 80 per cent renewable generation by 2030.
How to Get Involved Before Sunday
Great Big Green Week runs until Sunday 14 June. Events are taking place across Ireland through the weekend.
The official website at greatbiggreenweek.com has a searchable event finder. Events can also be registered directly on the site — if you are organising something in your community, registering it ensures it is counted and visible as part of the national movement.
Actions do not need to be large or organised. Picking up litter on a local walk, switching to a renewable energy tariff, planting a native species in a garden, or simply talking to a neighbour about home insulation — each of these, done this week, is participation in the largest community climate event Ireland and the UK have ever seen.
The Bottom Line
Great Big Green Week is not about perfection. It is about momentum. More than a million people showed up in 2025 to demonstrate, in the most practical and local way possible, that they care about climate and nature. In 2026, with five days remaining, the invitation is open. Together for good — starting this weekend.
Sustainability Pulse covers climate, energy, ESG and environmental policy through an Irish lens. Subscribe to the Sustainability Pulse Briefing — every Wednesday.