Every 23 March, the World Meteorological Organization commemorates the coming into force of the Convention establishing the World Meteorological Organization on 23 March 1950. Join us for the World Meteorological Day celebration to spotlight climate action. The ceremony embraces all the key players involved in tackling the climate crisis: the UN family. National meteorological and hydrological services, youth and civil society, policymakers and the private sector. This year, the World Meteorological Organization (WMO) is partnering with the UN Development Programme to launch a climate action campaign to raise awareness globally and mobilize society to act. This campaign will be launched on 21 March on television and social channels and live on stage at the WMO. It is supported by national meteorological and hydrological services, weather presenters and media outlets around the world. The message of the campaign is about ambition, commitment, and action from both policymakers and individuals. If we all join together, we can keep the 1.5° degree ambition alive. World Meteorological Day is on 23 March.