How to abbreviate Holy Day of Obligation?

The ways to abbreviate Holy Day of Obligation.

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HDO:
Holy Day of Obligation
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APASmart Define. (2017). holy day of obligation. Retrieved September 28, 2026, from http://smartdefine.org/holy_day_of_obligation/abbreviations/a
ChicagoSmart Define. 2017. "holy day of obligation" http://smartdefine.org/holy_day_of_obligation/abbreviations/a (accessed September 28, 2026).
HarvardSmart Define 2017, holy day of obligation, Smart Define, viewed 28 September, 2026, <http://smartdefine.org/holy_day_of_obligation/abbreviations/a>.
MLASmart Define. "holy day of obligation" 30 October 2017. Web. 28 September 2026. <http://smartdefine.org/holy_day_of_obligation/abbreviations/a>