The Armistice Celebrations were a holiday that celebrated the anniversary of the Ruusan Reformation. The celebrations would be held months after the meeting of the Anti-Republic Liberation Front members prior to the kidnap attempt on Serenno in 990 BBY according to the Lethan Twi'lek Kelad'den.
They were held across multiple Old Republic worlds a decade after the Seventh Battle of Ruusan, in 990 BBY, to mark the end of the New Sith Wars.