China'svictory over Japancommemoration related observances:

Armed Forces Day (Republic of China), V-J Day(People's Republic of China)

Commemorative observances in China mark the victory over Japan in World War II with Armed Forces Day in the Republic of China and V-J Day in the People’s Republic of China.
September 3 is the anniversary of China's victory over Japan in 1945, ending years of conflict during the Second Sino-Japanese War. In the Republic of China (Taiwan) it is observed as Armed Forces Day to honor military service and sacrifice. In the People's Republic of China it is known as V-J Day, commemorating Japan's formal surrender. Ceremonies include military parades, flag-raising events, wreath-laying, and memorial services. The day serves as a reminder of national resilience and the importance of peace and remembrance in Chinese society.
victory over Japan Armed Forces Day (Republic of China) V-J Day People's Republic of China

Feast of San Marino and the Republic, celebrates the foundation of theRepublic of San Marinoin 301.

San Marino's national feast day celebrates the legendary foundation of the world’s oldest republic in the year 301.
On September 3 San Marino observes its national feast day, commemorating its founding by Saint Marinus in 301 A.D. According to tradition, Marinus established a small Christian community on Mount Titano, which grew into the republic. Festivities include colorful parades, traditional music, folk dances, and the raising of the national flag. Citizens and visitors gather in historic squares to enjoy local cuisine, craft markets, and cultural performances. The celebration honors San Marino's enduring independence and rich heritage as the world's oldest surviving republic.
Feast of San Marino and the Republic Republic of San Marino

Merchant Navy Remembrance Day(Canada)

Canada’s Merchant Navy Remembrance Day pays tribute to civilian seafarers who served and died in wartime.
Observed on September 3, Merchant Navy Remembrance Day honors the Canadian merchant marine sailors who transported vital supplies during both World Wars. These civilian mariners faced dangerous conditions, including attacks by enemy submarines and mines. Ceremonies include wreath-laying at war memorials, church services, and moments of silence at sea. Veterans’ organizations, community groups, and government representatives gather to acknowledge their courage and sacrifice. The day serves as a reminder of the crucial role merchant seafarers played in supporting military operations and national defense.
Merchant Navy Remembrance Day Canada

Merchant Navy Day(United Kingdom)

The UK’s Merchant Navy Day commemorates the service and sacrifice of British merchant seafarers in wartime.
Merchant Navy Day is held on September 3 each year to honor the civilian sailors of Britain’s Merchant Navy. These seafarers braved hostile waters to deliver essential goods during both World Wars and later conflicts. Nationwide ceremonies feature wreath-laying at national memorials, church services, and moments of reflection. Representatives from the government, maritime institutions, and veterans’ groups participate to pay their respects. The observance highlights the overlooked yet vital role of merchant mariners in sustaining war efforts and national security.
Merchant Navy Day United Kingdom

Tokehega Day(Tokelau,New Zealand)

Tokehega Day commemorates the 1980 treaty defining the maritime boundary around Tokelau.
Tokehega Day, observed on September 3 in Tokelau, marks the signing of the Treaty of Tokehega in 1980 between New Zealand and the United States. The treaty established clear maritime boundaries around the Tokelau atolls, ensuring governance, resource management, and navigation rights. Local ceremonies feature speeches by community leaders, traditional songs, and cultural performances. Educational programs in schools focus on Tokelau’s history, marine conservation, and regional cooperation. The observance reinforces Tokelau’s identity and sovereignty within the Pacific and highlights the importance of peaceful international agreements.
Tokehega Day Tokelau New Zealand