Historical clue formulations

• Safe harbors — 2025-01-26
• Safe havens — 2022-04-26
• Havens — 2021-09-04
• Havens — 2019-06-05
• Shelters — 2017-07-18
• Retreats — 2012-07-29
• Refuges — 2012-04-08
• Places of respite — 2010-03-31
• Refuges — 2010-01-31
• Shelters — 2009-10-23
• Shelters — 2008-06-07
• Sanctuaries — 2006-01-19
• Refuges — 2004-02-19
• Retreats — 1999-09-11
• Sanctuaries — 1998-09-06
• Sanctuaries — 1998-05-20
• Refuges, old-style — 1997-10-07