National Pearl Harbor Day of Remembrance is observed on December 7 to honor and remember the lives lost in the surprise attack on Pearl Harbor, Hawaii, by the Japanese on December 7, 1941.

This day recognizes the important role played by the National Guard in protecting American communities and responding to domestic emergencies. The National Guard serves as the country's first line of defense in times of domestic emergencies and operates under the authority of both state and federal governments.

The U.S. Space Force was established on December 20, 2019, as the sixth branch of the U.S. military. The Space Force's primary mission is to protect US interests in space and to ensure freedom of operations in the space domain.

Four Chaplains Day is a holiday that honors the memory of four chaplains who sacrificed their own lives to save others during World War II. The four chaplains, who represented different religious denominations, have become a symbol of interfaith unity and courage in the face of adversity.

The USO, or United Service Organizations, is a nonprofit organization that provides programs, services, and live entertainment to members of the U.S. military and their families. The USO strengthens America’s military service members by keeping them connected to family, home, and country, throughout their service to the nation.

Salute to Veteran Patients Day is an opportunity for people to show gratitude for the service, and express support and care for the well-being of military-affiliated patients. The day is also a reminder of the ongoing need to provide quality care and support to veterans, particularly those who have been injured or have health conditions resulting from their service.

K-9 Veterans Day is observed annually on March 13 to honor the service and sacrifices of military working dogs and their handlers.

The American Legion is a nonpartisan organization of U.S. wartime veterans that was founded in 1919. Its mission is to support and advocate for veterans, promote patriotism and national security, and support youth and community programs.

Supreme Sacrifice Day is observed on March 18 each year to honor those who have made the ultimate sacrifice in service to their country. This day recognizes the bravery and selflessness of military personnel, police officers, firefighters, and other first responders who have given their lives while performing their duties.

This observance recognizes the contributions of women in military service throughout American history. The week-long celebration honors the women who have served in the U.S. armed forces, both in times of war and peace

Rosie the Riveter Day is celebrated on March 21 each year in honor of the iconic cultural icon that represented the hardworking women who supported the American war effort during World War II. Rosie the Riveter symbolized the millions of women who entered the workforce to replace male workers who were fighting in the war.

National Medal of Honor Day is a day to recognize and honor the brave individuals who have received this prestigious award.