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Acronymfinder

What does HDoO stand for?

HDoO stands for Holy Day of Obligation

This definition appears very rarely and is found in the following Acronym Finder categories:

  • Slang/chat, popular culture

Samples in periodicals archive:

31: The anticipatory Mass for the Solemnity of Mary, Mother of God -- a holy day of obligation -- will be celebrated at 5:15 p.