World Bicycle Day 2026 is celebrated globally on June 3, 2026. The United Nations-designated day highlights the bicycle's role as a simple, affordable, clean, and sustainable mode of transportation. This year's official theme is “Cycling for a Greener Future”.World Bicycle Day 2026 is celebrated globally on June 3, 2026. The United Nations-designated day highlights the bicycle's role as a simple, affordable, clean, and sustainable mode of transportation. This year's official theme is “Cycling for a Greener Future”.World Bicycle Day 2026 is celebrated globally on June 3, 2026. The United Nations-designated day highlights the bicycle's role as a simple, affordable, clean, and sustainable mode of transportation. This year's official theme is “Cycling for a Greener Future”.World Bicycle Day 2026 is celebrated globally on June 3, 2026. The United Nations-designated day highlights the bicycle's role as a simple, affordable, clean, and sustainable mode of transportation. This year's official theme is “Cycling for a Greener Future”.World Bicycle Day 2026 is celebrated globally on June 3, 2026. The United Nations-designated day highlights the bicycle's role as a simple, affordable, clean, and sustainable mode of transportation. This year's official theme is “Cycling for a Greener Future”.