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16 May: what is celebrated today
There are days that seem written in luminous ink: not to dazzle, but to remind. 16 May brings together science and coexistence, health and culture, intimate habits and public decisions. As if the world were telling us: look carefully—what illuminates also requires responsibility.
International Day of Light
UNESCO has celebrated it since 2017 to bring to the fore something so everyday that it sometimes becomes invisible: light as a driver of advances in science, energy, technology, education, art and sustainable development.
The date also nods to the history of research: on 16 May a laser was put into operation for the first time, and with it came a new way of measuring, healing, communicating and exploring. Switching on a lamp is easy; the difficult thing is for that light — literal and symbolic — to reach everyone.
International Day of Living Together in Peace
The UN established this day (since 2018) to remind us that peace is not a solemn word, but a daily practice: tolerance, solidarity, inclusion and respect, in the street and at home.
Living together in peace means accepting differences without turning them into trenches. It also means learning to resolve conflicts through dialogue, without humiliation or noise: a small ethic, repeated, that ends up becoming political.
World Heavy Metal Day
Since 2011, 16 May has celebrated metal as a living culture and global community. The date honours Ronnie James Dio, an essential figure in the genre, who died on 16 May 2010.
Heavy metal was born between the late 1960s and early 1970s, with electricity, distortion and an aesthetic of its own. But its secret is not volume: it is loyalty, that way of belonging to music which turns intensity into language.
European Obesity Day
In Europe, the third Saturday in May focuses attention on obesity as a disease and a risk factor for other chronic conditions. In 2026 it coincides with 16 May (and in 2027 it falls on the 15th), reminding us that prevention does not depend on a fixed calendar.
Talking seriously about obesity means moving beyond snap judgement: it is not just “willpower”, but context, access, habits, sedentary lifestyles, stress and inequalities. Awareness begins when we replace blame with support and policies that make healthy choices possible.
International Coeliac Day
This day seeks to raise awareness of coeliac disease, a condition affecting approximately 1% of the world's population, and to underscore the importance of early detection and treatment: a strict gluten-free diet.
For many people, life with coeliac disease is decided in the details: labels, traces, costs, eating out, repeated explanations. Empathy here is not abstract: it is offering safe options and not downplaying what, for others, is health.
World Whisky Day
It is celebrated on the third Saturday in May and arose from an initiative linked to Blair Bowman, as a tribute to a drink with centuries of history and a widespread cultural tradition.
The observance can be read as an invitation to memory: how certain drinks have accompanied rituals, grief and celebrations. It is also a modern reminder — without moralising — of a simple idea: enjoyment, if chosen, always with responsibility.
World Hereditary Angioedema Day
This day gives a name and attention to a rare, chronic and unpredictable disease: hereditary angioedema, with recurrent episodes of swelling that can be painful and disabling.
Awareness here saves time and, at times, lives: symptoms that are confused, diagnoses that take time, families learning to navigate uncertainty. Raising visibility opens the way to specialist care, support and treatments that improve quality of life.
World Congenital Disorders of Glycosylation Awareness Day
CDG are rare and complex genetic disorders that affect glycosylation, a process essential to the formation and function of proteins in the body. That is why 16 May is devoted to informing and supporting.
When a disease is rare, isolation is often common. This day insists on the opposite: research, early diagnosis, multidisciplinary teams and a community that leaves no one out for “not being a statistic”.
World Salt Awareness Week
From 12 to 18 May, the week highlights an uncomfortable reality: much of the salt we consume is not visible, because it is hidden in processed products and prepared foods.
Food education becomes a form of freedom: learning to read labels, cooking more simply, reducing excess without losing pleasure. Less salt is not punishment; it can be a pact with the heart, sustained day after day.
United Nations Global Road Safety Week
Also from 12 to 18 May, this week reminds us that mobility is a right that should not cost lives. The UN and WHO promote campaigns to prevent deaths and injuries from road traffic accidents.
Road safety is built through urban design, reasonable speed limits, public transport, checks, technology and civic culture. At heart, it is a moral question: how much speed is someone else’s life worth?