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The Feast of the Holy Trinity, also known as Troitsa, is a Christian holiday celebrated on the Sunday following Pentecost. This feast honors the Holy Trinity: God the Father, God the Son, and God the Holy Spirit. It has been observed since at least the 10th century and was officially approved for the entire church in 1334. In Eastern Orthodox traditions, the first day of the Pentecost feast is called Trinity Sunday. In Russia, Troitsa is a traditional holiday where homes are decorated with fresh green branches, and girls create garlands of birch branches and flowers for fortune-telling.12

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