National Days in May
44 observances and awareness days are listed for May.
A widely observed labour day associated with workers, labour movements, and solidarity.
National Day observed in Marshall Islands on May 1.
A United Nations international observance marked on May 2.
Constitution Day observed in Poland on May 3.
An official international observance listed by UNESCO and marked on May 3.
An official international observance listed by UNESCO and marked on May 5.
A WHO campaign day promoting hand hygiene in health care.
An official international observance listed by UNESCO and marked on May 5.
An annual day celebrating Red Cross and Red Crescent volunteers, staff, principles, and humanitarian action.
A European Union observance celebrating peace and unity in Europe.
A United Nations observance recognizing the argan tree and the Arganeraie Biosphere Reserve.
A United Nations-designated FAO observance highlighting the importance of plant health.
An international day recognizing nurses and their contribution to health systems and society.
National Day observed in Paraguay on May 14.
A United Nations international observance marked on May 15.
An official international observance listed by UNESCO and marked on May 16.
An official international observance listed by UNESCO and marked on May 16.
Constitution Day observed in Norway on May 17.
A United Nations international observance marked on May 17.
A United Nations observance promoting fair play, friendship, solidarity, and respect in sport.
National Day observed in Cameroon on May 20.
Restoration of Independence observed in Timor-Leste on May 20.
A United Nations international observance marked on May 20.
An official international observance listed by UNESCO and marked on May 20.
A United Nations international observance marked on May 21.
An official international observance listed by UNESCO and marked on May 21.
An official international observance listed by UNESCO and marked on May 22.
Unification Day observed in Yemen on May 22.
A United Nations international observance marked on May 23.
Independence Day observed in Ecuador on May 24.
Independence Day observed in Eritrea on May 24.
A United Nations observance highlighting conservation of the markhor.
An African Union observance marking the founding of the Organisation of African Unity.
Independence Day observed in Jordan on May 25.
National Day observed in Argentina on May 25.
A United Nations observance recognizing football’s global reach and role in society.
King's Birthday observed in Denmark on May 26.
National Day observed in Georgia on May 26.
National Day observed in Azerbaijan on May 28.
National Day observed in Ethiopia on May 28.
A United Nations international observance marked on May 29.
A United Nations-designated FAO observance recognizing the potato’s role in food security, nutrition, and livelihoods.
Statehood Day observed in Croatia on May 30.
A World Health Organization global public-health observance marked on May 31.
Frequently Asked Questions
No. Official public holidays and UN or government-backed observances are labeled separately from curated awareness days and cultural entries.
Each entry carries a source label where available. The national-days layer avoids presenting weakly sourced awareness days as official holidays.