On March 12, 2019, the World Wide Web turned 30. We embarked on a 30-hour journey — from CERN in Switzerland to the Science Museum in London to W.TEC in Lagos — to commemorate the web’s past while also looking ahead to the fight for its future. Here’s a look at the celebrations.

To mark the occasion, we also created a crowdsourced timeline on Twitter, capturing the milestones and moments that brought us to #Web30 — and featuring tweets by our founder and web inventor Sir Tim Berners-Lee, founding director of the Web Science Trust Dame Wendy Hall, Amazon, the Nobel Women’s Initiative, former Prime Minister of Estonia Andrus Ansip, and many, many more.

In 1989, @timberners_lee submitted a proposal that would change the world.

To celebrate #Web30, for the next 30 hours we’re asking everyone to contribute to a crowdsourced timeline of web milestones.

Share your web moments at #Web30#ForTheWeb: https://t.co/8dRv1wdsOipic.twitter.com/5GKuamd45p

— The Web Foundation (@webfoundation) March 12, 2019

In 1994, I was proud to be part of the first Presidential email exchange with another head of state, @carlbildt, then-Prime Minister of Sweden. In my message, I thanked him for his support as America ended the trade embargo on Vietnam. #Web30#ForTheWeb

— Bill Clinton (@BillClinton) March 12, 2019

I was lucky to be a young person when the digital revolution was just getting under way, and my Microsoft colleagues and I had the chance to help shape it. Celebrating #Web30 leaves me feeling nostalgic about 1995. https://t.co/krIFxTGd1q

— Bill Gates (@BillGates) March 12, 2019

In 2001 @Wikipedia was launched. Thank you to the millions of Wikipedians who have contributed to the web’s biggest encyclopedia over the last 18 years. #Web30#ForTheWeb

— Jimmy Wales (@jimmy_wales) March 12, 2019

In 2010, Nairobi’s flagship tech co-working space @iHub was founded with the aim of catalyzing the local tech community. In the subsequent year, @iHubResearch was founded. https://t.co/04qbsF218w#Web30#ForTheWeb

— Angela Okune (@Honoluluskye) March 13, 2019

In 2012 @Karisma began to advocate for an open, safe and inclusive #Internet in Colombia 🇨🇴 #Web30#ForTheWebpic.twitter.com/DoxepBdKsr

— Fundación Karisma (@Karisma) March 13, 2019

In 2013, we launched @A4A_Internet to make the internet more affordable in developing countries. Everyone should have the opportunity to access the web and use it to improve their lives #Web30#ForTheWeb

— Ann Mei Chang (@annmei) March 13, 2019

In his annual birthday letter, Sir Tim Berners-Lee called on us all to join together to fight for the web’s future.

Given how much the web has changed in the past 30 years, it would be defeatist and unimaginative to assume that the web as we know it can’t be changed for the better in the next 30. If we give up on building a better web now, then the web will not have failed us. We will have failed the web.

– Sir Tim Berners-Lee

Thank you for getting involved as the web turned 30. From sharing your stories about what the web means to you, to contributing to our timeline of the web’s history, to signing the Contract for the Web and joining our events online, your participation allowed us to celebrate in style.

So thirty years on, what’s next for the web? That’s up to you.

Safeguard the future of the web as a positive force for the world by supporting the Contract for the Web. Everyone has a role to play to ensure the web serves humanity, and the contract will outline the responsibilities that governments, companies, and citizens each have to protect the web.

Together, we can build a better web.

For updates about our work, sign up to our newsletter and follow us on Twitter at @webfoundation.

To receive a weekly news brief on the most important stories in tech, subscribe to The Web This Week.