Yhyаkh (Yakut: Ыһыах, romanized: Ihıax, IPA [ɯhɯaχ]) is the festival that celebrates the rebirth of nature after a hard winter, the triumph of life, the beginning of a new year in the Sakha Republic.

Its traditions include women and children decorating trees and tethering posts with "salama" (nine bunches of horse hair hung on horse-hair ropes).

The Ohuokhai (Оhуохай) dance has its roots in the period when the Sakha people lived further south and were cattle-breeders, termed "sun worshippers".

The Sakha word for "dance", Üñküü (Yҥкүү) comes from the verb üñ (Үҥ, "to worship").

This technique gives a unique national Sakha colouring highly appreciated by experts in "throat singing".

A famous folk singer, poet and composer, Sergey Zverev from the Suntarsky region added many new elements in the expressiveness of the movements.

On June 23, 2024, the Sakha American Cultural Association in Washington State organized and celebrated Yhyakh in Lynnwood, WA.