Kish'altriq was a Vulcan celebration held sometime prior to 2135. "Kish'altriq" was also used as a code word between T'Pol and her former V'Shar colleague, Denak, to convey that he was in a safe position to talk. (ENT novel: Kobayashi Maru)

It is unclear from the context whether this was a one-time celebration, or one regularly observed. Denak implies that he and T'Pol were together during this celebration, though this may be subterfuge.
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