Meaning of 弓場始 in Japanese

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Definition of 弓場始

ゆみば(yumiba) 【弓場】

ゆばはじめ(yubahajime) 【弓場始め】

(n) ceremony on the fifth day of the 10th lunar month in which the emperor would watch prize archery (Heian and Kamakura periods)
first firing of the bow (after the New Year or the reconstruction of the archery range (in military families))