I want to know the answer to the following question:
When does promotion from major to lieutenant colonel in the USAF typically occur?
All the background I'm provided with is that "Promotion from major to lieutenant colonel is similar and occurs approximately between the thirteen year (for officers who were promoted to major early "below the zone") and the fifteen year mark, where a certain percentage of majors will be selected below zone (i.e., "early"), in zone (i.e., "on time") or above zone (i.e., "late") for promotion to lieutenant colonel.". Is that enough to answer the question?
Answer: yes