Forth week of April, 2026 Calendar with holidays, observances and special days

Jose de Diego’s memory has been honored in Puerto Rico by having his birthdate observed as an official holiday as well as the naming of schools, avenues, and a highway af..→

Patriots’ Day is an official state holiday in Maine, Massachusetts and Wisconsin commemorating the anniversary of the Battles of Lexington and Concord, the first battles ..→

John Muir (April 21, 1838 – December 24, 1914) was a Scottish-American naturalist, author, environmental philosopher and early advocate of preservation of wilderness in t..→

San Jacinto Day is the celebration of the Battle of San Jacinto on April 21, 1836. It was the final battle of the Texas Revolution where Texas won its independence from M..→

It is imperative we use creativity in problem-solving to address the challenges we face. Traditional thinking will no longer do, - Ambassador I. Rhonda King, Permanent Re..→

Administrative Professionals Day (also known as Secretaries Day or Admin Day) is an unofficial secular holiday observed in several countries to recognize the work of secr..→

Earth Day is an annual event, celebrated on April 22, on which day events worldwide are held to demonstrate support for environmental protection. It was first celebrated ..→

Wisconsin Public School Observance Day, marking the anniversary of Earth Day and urging schools to conduct programs across subject areas to enhance students’ understandin..→

World Book Day or World Book and Copyright Day (also known as International Day of the Book or World Book Days) is a yearly event on April 23rd, organized by the United N..→

Arbor Day (or Arbour; from the Latin arbor, meaning tree) is a holiday in which individuals and groups are encouraged to plant and care for trees. Today, many countries o..→

World Day for Laboratory Animals on April 24 is a United Nations recognized day of international commemoration of the suffering and killing of millions of innocent sentie..→

Astronomy Day is an annual event in the United States intended to provide a means of interaction between the general public and various astronomy enthusiasts, groups and ..→

Interesting facts: Scientific calculations, the DNA of all living people, which is more than 7.6 billion people will fit in a teaspoon and will weigh about 1.2 grams. DN..→

World Malaria Day (WMD) is an international observance commemorated every year on 25 April and recognizes global efforts to control malaria. Globally, 3.3 billion people ..→

World Intellectual Property Day is observed annually on 26 April. The event was established by the World Intellectual Property Organization (WIPO) in 2000 to "raise ..→