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21 October: what is celebrated today
21 October is a singular date in the global calendar. On this day, three celebrations converge which, although different, share the same view of the future: World Energy Saving Day, which reminds us of the urgency of preserving the planet’s resources; World Clinical Engineering Day, which pays tribute to innovation and technology in the service of health; and Back to the Future Day, an observance born from cinema that invites us to imagine what is to come. Each, in its own way, speaks to us of progress, responsibility and creativity: three essential pillars p
World Energy Saving Day: every gesture counts
Every 21 October, the world celebrates World Energy Saving Day, an occasion that seeks to raise awareness of the need to reduce energy consumption and protect the planet’s natural resources.
Although its exact origin is not fully documented — some sources attribute it to the World Energy Forum in 2012 — its purpose is universal: to remember that the energy future depends on the actions we take today.
Saving energy is not only about switching off lights or unplugging appliances. It involves a change of mindset: using energy intelligently, committing to renewable sources and rethinking our consumption habits.
Initiatives such as Earth Hour, held every March, show us that a gesture as simple as switching off the light for an hour can become a powerful symbol of unity for the Earth.
Because caring for energy means caring for our common home. What we do today will determine the planet that future generations inherit.
World Clinical Engineering Day: technology at the service of life
World Clinical Engineering Day, also celebrated on 21 October, recognises the work of thousands of professionals who combine science, technology and vocation to improve health and save lives.
The date was promoted by the organisers of the International Congress of Clinical Engineering and Health Technology Management (ICEHTMC) and has the support of the World Health Organization (WHO).
Clinical engineers are responsible for designing, maintaining and optimising the medical equipment that makes modern diagnoses and treatments possible: from ventilators to imaging systems, including the monitoring devices that save lives every day.
In a world where technology is advancing at great speed, this discipline becomes essential to ensure that scientific advances translate into safer, more efficient and more humane medical care. This day is a recognition of their quiet but indispensable work: the guardians of the functioning behind modern medicine.
Back to the Future Day: when imagination gets ahead of reality
21 October also has a place reserved for lovers of cinema and science fiction: Back to the Future Day, which commemorates the exact date — 21 October 2015 — on which Marty McFly and Doc Brown travelled to the future in the iconic film Back to the Future Part II.
Although the film was released in 1989, its cultural legacy is more alive than ever. Every year, fans celebrate this day with special screenings, cosplay gatherings, displays of DeLorean replicas and film marathons in honour of a saga that marked generations.
Beyond nostalgia, Back to the Future reminds us of something fascinating: many of the film’s predictions came true. Video calls, portable devices, electric cars and even the obsession with technology were only dreams in the 1980s… today they are part of our everyday lives.
Back to the Future Day is therefore a celebration of human imagination: that spark which inspires both scientists and dreamers to keep reinventing tomorrow.