What are the boundary dates for the Celtic Revival literary period?

Hi
What are the boundary dates for the Celtic Revival literary period? I couldn’t find any dates to make its beginning or end. Is it considered a sub-genre?
I look forward to your feedback.

Generally speaking the Celtic Revival coincides with the career of W.B. Yeats, starting around 1892 when Yeats & co. founded the Irish Literary Society and coming to full blossom when he received the 1923 Nobel Prize in Literature. That is not to say Irish literature died down after 1923, but the revival was at that point “successful”.

~Max

Thanks Max S. Very helpful.