Historical clue formulations

• N.L. East or A.F.C. West — 2025-03-26
• A.L. or N.L. East: Abbr. — 2016-09-09
• Stock payout: Abbr. — 2013-01-15
• League unit: Abbr. — 2012-07-04
• Opposite of mult. — 2011-10-31
• Military grp. — 2008-05-16
• Opposite of multiplication: Abbr. — 2006-10-30
• A.L. East, e.g.: Abbr. — 2002-01-05
• Corporate sect. — 2001-11-03
• Army grp. — 1998-11-13
• Arith. process — 1995-01-08