What does HDoO stand for?

Holy Day of Obligation

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

Slang/chat, popular culture

Other Resources:

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Samples in periodicals archive:

Reflecting the Virgin Mary's importance, the Feast of the Immaculate Conception, on December 8, is a holy day of obligation in U.

No hope for Darwin; ANSWERS TO CORRESPONDENTS

Though Ash Wednesday is not a holy day of obligation, we turn out at church in great numbers.

Closed for Lent: don't forget to pencil in time for nothing during ...

It's considered a sin in the Catholic church not to attend Mass on Sundays and every holy day of obligation," she said.

Minn. mom fights church ban on her autistic son

Fact of the day For the 800,000 Roman Catholics in Western Washington, today is a Holy Day of Obligation, when Catholics are obliged to attend Mass just like on Sunday.

Here & Now

Even though Ash Wednesday is not considered by the Catholic Church to be a holy day of obligation, Gehl expects to see thousands of people come to Masses to receive the ash mark.

WEARING THE ASHES; ROMAN CATHOLICS TO MARK OPENING OF LENTEN SEASON

JANUARY 1 MARY, MOTHER OF GOD Catholic holy day of obligation when the faithful must attend a mass to honor Mary as the Mother of God.

Dealing with religious diversity in the work place: a managerial ...

After my smile faded, I, couldn't help but realize two things: 1) It s a sin not to vote; and 2) the first Tuesday in November should be a holy day of obligation (in America) celebrating the Feast of Civic Responsibility.

It's a sin not to vote: the first Tuesday in November should be a ...

All Souls Day is November 2 and not a holy day of obligation.

What's the difference between All Saints and All Souls?