Christianfeast day:

Acepsimas of Hnaitaand companions (Catholic Church), Arwald, Epipodius and Alexander, Hudson Stuck(Episcopal Church), John Muir(Episcopal Church), Opportuna of Montreuil, Pope Caius, Pope Soter, StSenorina, April 22 (Eastern Orthodox liturgics)

Christian feast days commemorate saints and notable figures across various denominations on April 22.
On April 22, the Christian liturgical calendar celebrates a variety of feast days including Acepsimas of Hnaita and companions in the Catholic Church, Saint Arwald, Saints Epipodius and Alexander, Hudson Stuck and John Muir in the Episcopal tradition, Saint Opportuna of Montreuil, Popes Caius and Soter, Saint Senorina, and the Eastern Orthodox commemorations. These observances honor the faith, sacrifice, and missionary work of early martyrs, clergy, and lay figures. The diversity of rites reflects the rich tapestry of Christian history and devotion. Special masses, prayers, and community gatherings take place in churches worldwide. Each feast provides an opportunity to reflect on spiritual heritage and the enduring impact of these figures.
feast day Acepsimas of Hnaita Catholic Church Arwald Epipodius and Alexander Hudson Stuck Episcopal Church John Muir Episcopal Church Opportuna of Montreuil Pope Caius Pope Soter Senorina April 22 (Eastern Orthodox liturgics)

Fighter Aviation Day (Brazil)

A Brazilian observance honoring the country’s fighter aviation forces and their contributions to national defense.
Fighter Aviation Day in Brazil celebrates the valor and achievements of the Brazilian Air Force’s fighter pilots and support crews. Established to recognize their dedication and technological prowess, events include aerial demonstrations, exhibitions of aircraft and ceremonies at air bases. The day highlights the strategic importance of fighter aviation in safeguarding national airspace. Military museums and educational programs also participate to raise public awareness. Civilian aviation enthusiasts often attend to witness historic and modern fighter jets in flight.

Discovery Day(Brazil)

A celebration marking the arrival of Portuguese explorers in Brazil in April 1500.
Discovery Day in Brazil commemorates the landing of the Portuguese expedition led by Pedro Álvares Cabral on April 22, 1500. This event marked the beginning of Brazil’s history under European influence and the foundation for its multicultural heritage. Today, regional ceremonies and reenactments take place at coastal landmarks where the first explorers landed. Schools often host educational activities to discuss the historical context and its long-term effects on indigenous populations. The day fosters reflection on Brazil’s origins and the diverse identities that shape its national story.
Discovery Day

Earth Day(International observance)and its related observance:International Mother Earth Day

An annual international event to promote environmental protection and awareness.
Earth Day, first held in 1970 in the United States, has grown into a global movement dedicated to preserving the planet. Officially recognized by the United Nations as International Mother Earth Day in 2009, it mobilizes millions worldwide through tree plantings, cleanups, and sustainability campaigns. The day emphasizes the importance of biodiversity, climate action, and responsible resource use. Governments, NGOs, schools, and businesses organize events to educate communities and inspire policy changes. Earth Day has become a focal point for collective efforts to address environmental challenges and advocate for a healthier world.
Earth Day International observance International Mother Earth Day

Holocaust Remembrance Day (Serbia)

Serbia’s official day to honor and remember the victims of the Holocaust.
Holocaust Remembrance Day in Serbia, observed on April 22, pays tribute to the Jewish and Roma victims who perished during World War II. Established by the Serbian government in 2013, the day features ceremonies at former concentration camp sites such as Sajmište. Memorial services, educational programs, and museum exhibitions help keep the memory of the atrocities alive. Survivors and their families often share testimonies to new generations. The observance reinforces the commitment to combat anti-Semitism and intolerance in modern society.
Holocaust Remembrance Day (Serbia)

From 2018 onwards, a national day of commemoration for the murdered teenagerStephen Lawrence(United Kingdom)

A UK national day commemorating Stephen Lawrence and the ongoing fight against racial injustice.
Since 2018, April 22 in the United Kingdom honors the memory of Stephen Lawrence, a Black teenager murdered in a racially motivated attack in 1993. The day marks the launch of initiatives to address systemic racism and support community cohesion. Events include educational workshops, memorial gatherings, and public talks highlighting the legacy of the MacPherson report into the Metropolitan Police’s handling of the case. It serves as a reminder of the importance of equality and justice for all. Organizations use the day to promote dialogue on diversity and inspire positive societal change.
Stephen Lawrence

Acepsimas of Hnaitaand companions (Catholic Church)

Catholic feast day celebrating Acepsimas of Hnaita and his companion martyrs.
Saint Acepsimas of Hnaita and his companions were fourth-century Christian martyrs who suffered persecution for their faith in Persia. Their devotion and endurance under torture became a powerful testament to early Christian witness. The Catholic Church honors their memory on April 22 with special liturgies and prayers. The faithful reflect on their courage and the enduring strength of faith in the face of adversity. Devotional acts such as reciting their prayers foster spiritual solidarity with the martyrs.
Acepsimas of Hnaita Catholic Church

Arwald

Feast day of Saint Arwald, a seventh-century martyr and last pagan king of the Isle of Wight.
Saint Arwald, once the king of the Isle of Wight in the seventh century, is remembered for his conversion to Christianity and ultimate martyrdom by King Caedwalla of Wessex. His feast on April 22 celebrates his heritage as a bridge between pagan traditions and the Christian faith in early medieval England. Local churches and historical societies on the Isle of Wight host commemorative services and talks about his life. Arwald’s legacy highlights themes of faith, identity, and cultural transition. Pilgrims and history enthusiasts honor his memory with visits to sites associated with his reign.
Arwald

Epipodius and Alexander

Feast of Saints Epipodius and Alexander, early Christian martyrs from Lyon.
Saints Epipodius and Alexander were close companions of Saint Denis and were martyred in Lyon during Roman persecutions in the mid-third century. Their steadfast faith and charitable deeds are celebrated each year on April 22 in various Christian communities. The liturgy includes readings about their witness and prayers for courage in adversity. Faithful gather to honor their sacrifice and remember the origins of Christianity in Gaul. The commemoration underscores the enduring bond of Christian friendship and solidarity.
Epipodius and Alexander

Hudson Stuck(Episcopal Church)

Commemoration of Hudson Stuck, Episcopal priest, missionary, and pioneering mountaineer.
Hudson Stuck was an Episcopal priest and Alaskan missionary born in 1863 who became renowned for leading the first successful ascent of Denali (Mount McKinley) in 1913. His work among indigenous communities in Alaska and advocacy for their rights earned him lasting respect. The Episcopal Church honors his life and achievements on April 22 with special prayers and remembrances. His dual legacy of spiritual care and exploration continues to inspire mountaineers and faith communities alike. Annual services often include reflections on stewardship of the wilderness and social justice.
Hudson Stuck Episcopal Church

John Muir(Episcopal Church)

John Muir, the renowned Scottish-American naturalist and conservationist, is honored by the Episcopal Church on this day.
John Muir (1838–1914) was a pioneering naturalist and advocate for the preservation of wilderness in the United States. Founder of the Sierra Club, he played a key role in establishing national parks such as Yosemite and Sequoia. His writings and activism inspired generations to protect wild places. On April 22, the Episcopal Church commemorates his profound spiritual connection to nature and his enduring environmental legacy. Services often highlight creation care and include prayers for stewardship of the earth.
John Muir Episcopal Church

Opportuna of Montreuil

Opportuna of Montreuil was a medieval Benedictine abbess in northern France, revered for her devotion and leadership.
Opportuna of Montreuil was a Benedictine abbess known for her humble service and spiritual wisdom. Leading a community of nuns in northern France, she earned a reputation for ascetic practices and charitable care for the poor. Her gentle guidance and reputed miracles attracted pilgrims seeking counsel and healing. Each year on April 22, her feast honors themes of piety, mercy, and dedication to contemplative life. Traditions include sharing stories of her counsel and reflecting on the power of quiet leadership.
Opportuna of Montreuil