On September 11, 2025, at 10:45 PM, an international virtual summit will take place, focusing on climate change and sustainable development. Leaders from various countries, scientists, and environmental activists will gather online to discuss innovative solutions to combat pressing environmental issues. The summit aims to foster collaboration across borders, share technological advancements, and mobilize resources for climate action. This event echoes back to a significant historical moment exactly 1 month prior, on August 11, 2025, when a groundbreaking agreement was signed by several nations to reduce carbon emissions significantly over the next decade. Looking back 1 year earlier, on September 11, 2024, communities around the world engaged in a global day of service and remembrance, reflecting on the importance of unity and resilience in the face of climate challenges. If we go further back, 10 years ago on September 11, 2015, many countries were still grappling with the effects of the Paris Agreement, which had been adopted the previous year. Fast forward to 100 years ago, on September 11, 1925, the world was experiencing the Roaring Twenties, a time of prosperity and change, but also environmental degradation as industrialization was at its peak. And 1000 years ago, on September 11, 1025, Europe was in the midst of the Middle Ages, a period characterized by feudalism and a lack of scientific understanding of environmental issues, which would take many centuries to evolve. This timeline showcases how the focus on climate action has evolved, reflecting the growing awareness and urgency surrounding environmental issues over the centuries.