Portal:Society/Selected anniversaries/September

≠→
 * 14 September 1955 - Foundation of the Society of Experimental Test Pilots
 * 20 September 1848 - American Association for the Advancement of Science (pictured) created in Pennsylvania
 * 21 September 1995 - Nepal Physical Society signed the agreement to be a reciprocal society with the American Physical Society (APS)
 * 30 September 1845 - Phi Alpha Literary Society founded in a college dorm room