Memorial Day is a federal holiday in the United States observed on the last Monday in May to honor the men and women who died while serving in the military.

Armistice Day, also known as Remembrance Day, is a holiday observed on November 11 to mark the anniversary of the armistice signed between the Allies and Germany on November 11, 1918, which ended World War I.

A commissioning ceremony is a formal ceremony held to mark the commissioning of a new military officer. During the ceremony, the officer is presented with their commission, which is a document that正式に任命します。

A retirement ceremony is a formal ceremony held to mark the retirement of a military officer. During the ceremony, the officer is presented with a retirement certificate and other honors.

A promotion ceremony is a formal ceremony held to mark the promotion of a military officer to a higher rank. During the ceremony, the officer is presented with their new rank insignia and other honors.

A change of command ceremony is a formal ceremony held to mark the transfer of command of a military unit from one officer to another. During the ceremony, the outgoing commander passes the unit colors to the incoming commander.

A dedication ceremony is a formal ceremony held to mark the dedication of a new military installation. During the ceremony, the installation is officially named and opened for use.

A decommissioning ceremony is a formal ceremony held to mark the decommissioning of a military vessel. During the ceremony, the vessel is officially removed from active service.

A launching ceremony is a formal ceremony held to mark the launch of a new military vessel. During the ceremony, the vessel is officially named and launched into the water.

An arrival ceremony is a formal ceremony held to mark the arrival of a new military unit at its new duty station. During the ceremony, the unit is officially welcomed by the local community.

A departure ceremony is a formal ceremony held to mark the departure of a military unit from its duty station. During the ceremony, the unit is officially bid farewell by the local community.

A deployment ceremony is a formal ceremony held to mark the deployment of a military unit to a combat zone. During the ceremony, the unit is officially bid farewell by the local community and given its orders.

A welcome home ceremony is a formal ceremony held to mark the return of a military unit from a combat zone. During the ceremony, the unit is officially welcomed back by the local community.

An awards ceremony is a formal ceremony held to mark the awarding of a military decoration. During the ceremony, the recipients are presented with their decorations and given a citation explaining their achievements.

A retirement ceremony is a formal ceremony held to mark the retirement of a military flag. During the ceremony, the flag is officially retired and given a place of honor.