Definition of O-day
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O-day Definition from Government Dictionaries & Glossaries
DOD Joint Acronyms and Abbreviations
O-day Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
- M day, M Day, and M-day redirect here; for the Marvel Universe event, see Decimation (comics). H-Hour redirects here; for the SOF Studios video game, see ; for the D-Day designation, see H-hour (D-day).
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