Historical clue formulations

• Big letters in bowling — 2026-04-05
• Inits. in a bowling alley — 2019-07-27
• Letters on some bowling lanes — 2019-01-20
• Big inits. in bowling — 2015-12-30
• Big letters in bowling alleys — 2015-04-11
• Inits. in bowling lanes — 2012-04-01
• Big inits. in bowling — 2006-09-14
• Bowling lane equipment inits. — 2006-04-19
• Big inits. in bowling — 2005-01-30
• Big inits. in bowling — 2002-05-18
• Big inits. in bowling — 2002-05-02
• Bowling alley inits. — 1998-09-13
• Bowling alley initials — 1998-06-03