commemorating
v.v. doing something special to remember and honor an important person or event from the past. It is often used for ceremonies or monuments that keep a memory alive.
v. recalling and showing respect for someone or something in a formal ceremony or through a lasting object. Present participle of 'commemorate'; functions as the head of a progressive verb phrase or a gerund.
The city is commemorating the soldiers with a new statue.
By commemorating the anniversary of the treaty, both nations hope to strengthen their current diplomatic ties.
The museum is currently commemorating the centennial of the artist's birth with a comprehensive retrospective that spans her entire career from early sketches to final masterpieces.
Transitive — requires a direct object representing the person, event, or anniversary being honored.
They are commemorating about the war.They are commemorating the war.Commemorate is a transitive verb and does not take the preposition 'about'.