September 21, 2014 is shaping up to be a day for the history books. Echoing the words of Paulo Coelho, “Life was always a matter of waiting for the right moment to act.” That moment is now.

When people ask: “Where were you when the world came together and changed for the better?” Without hesitation you will tell them: “I was in the streets of New York City, part of the People’s Climate March.”

Surrounded by old friends, and new friends, by family, by neighbors and by tens of thousands of people from all walks of life and every ethnic, religious and political background, we will tell them: “We came together to let the world know that we want and demand a brighter future for our children and ourselves.”

The Secretary General of the United Nations has put out a call to world leaders to join him at a summit in New York City on September 23, the day before the opening of the Annual United Nations General Assembly:

“There is opportunity amid this [climate change] peril – a chance to change the way we do business, plan our cities, fuel our homes and factories, and move our goods and ourselves. A low-carbon path beckons – a path that can create jobs and improve public health while safeguarding the environment. To help set us on this course, I invite all of you to a Climate Change Summit … in New York City.”

We are a coalition of parents’ organizations that are joining forces to encourage participation in the March on September 21 – including Moms Clean Air Force, The Mothers Project, Mothers Out Front, Climate Parents, and many more. We will be joining labor groups, students, faith based organizations, environmental justice groups, artists, grandparents, military families, teachers, bankers, engineers, farmers and factory workers – hundreds of organizations and hundreds of thousands of individuals – collectively letting our world leaders know we are watching them closely and we can’t wait any longer for climate solutions.

Our elected leaders have been talking for more then 20 years, taking little real action to address the climate crisis. Meanwhile, our planet has been getting sicker, and we have put the future of our children and ourselves in peril. It’s time that our leaders heard clearly from us. Unless they work together for positive change, we will find and elect others who can and will create this change. We teach our children to lead by example, yet our elected officials, business and community leaders have been poor role models when it comes to climate solutions. view photo essay The Arctic's devastating transformation There was no snow, no sea ice anywhere to be seen. These would be my last days in Svalbard in August of 2011.

We are marching for a future in which we walk with a much lighter step on our planet, one which uses only renewable energy and encompasses a more mindful and thoughtful way of living. We support political leadership, businesses, organizations and individuals that promote, plan and work together towards repairing our planet; allowing our Earth the time and the opportunities it needs to heal.

We will be singing together, walking together and showing the world that we are ready to alter the course of history. It’s not too late to avert the impending crash that scientists tell us we are headed for with our natural world.

The People’s Climate March will be a party like only New York City can throw: A must-attend event with an open invitation to all. Where will you be on September 21? Join us now.

Harriet Shugarman is the executive director of ClimateMama and a mentor and leader at The Climate Reality Project.