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What does F-hour stand for?

F-hour stands for effective time of announcement by the Secretary of Defense to the Military Departments of a decision to mobilize Reserve units

This definition appears very frequently

Other Resources: Acronym Finder has 1 verified definitions for F-hour

Samples in periodicals archive:

The effective time of announcement by the Secretary of Defense to the Military Departments of a decision to mobilize Reserve units. d. H-hour.
Military Acronyms; effective time of announcement by the Secretary of Defense to the Military Departments of a decision to mobilize Reserve units; Military...