Historical clue formulations

• N.F.L. div. — 2025-12-18
• Fiscal year div. — 2020-12-27
• Play period: Abbr. — 2018-09-23
• 15 min. of college football — 2018-06-25
• 12 mins., in the N.B.A. — 2018-01-21
• Three months: Abbr. — 2017-01-03
• 15 mins. of an N.F.L. game — 2016-04-17
• Super Bowl div. — 2013-06-09
• One ends on Sept. 30 — 2012-12-08
• 12 or 15 min. — 2009-07-30
• Game period: Abbr. — 2007-04-25
• N.F.L. period: Abbr. — 2007-02-27
• Part of the sch. year — 2006-03-04
• Time unit in basketball: Abbr. — 2005-12-15