Historical clue formulations

• The last of the Pillars of Islam — 2020-08-30
• Pilgrimage to Mecca — 2020-03-30
• Pilgrimage to Mecca — 2019-02-20
• Islam's final pillar — 2018-02-11
• One of the Five Pillars of Islam — 2017-10-24
• Muslim pilgrimage — 2017-09-06
• The last of the Pillars of Islam — 2016-10-20
• One of the Five Pillars of Islam — 2016-03-20
• Trek ending in Mecca — 2013-05-01
• Muslim's pilgrimage — 2010-11-09
• Muslim's pilgrimage — 2009-08-17
• Trek to Mecca — 2009-07-01
• Journey to Mecca — 2009-06-23
• Religious pilgrimage — 2008-03-23
• Mecca trek — 2007-01-24
• Muslim pilgrimage — 2006-06-19
• Muslim pilgrimage — 2006-05-16
• Pilgrimage to Mecca — 2006-03-29
• Pilgrimage to Mecca — 2004-12-19
• Muslim pilgrimage — 2004-08-17
• Pilgrimage to Mecca — 2004-08-03
• Muslim pilgrimage — 2002-04-07
• Muslim pilgrimage — 2001-02-14
• It ends in Mecca — 2000-03-01
• One of the Pillars of Islam — 2000-01-27
• Muslim journey — 1999-04-14
• One of the Pillars of Islam — 1998-09-05
• Pilgrimage to Mecca — 1998-02-10
• One of the Pillars of Islam — 1997-11-29
• Requirement of Islam — 1997-09-03
• Trip to Mecca — 1997-07-01
• Pilgrimage to Mecca — 1996-05-20
• Mideast pilgrimage — 1995-11-16
• Muslim journey — 1995-10-03
• Trip for a 21-Across — 1995-04-06
• Pilgrimage — 1995-01-26
• Muslim pilgrim — 1994-10-03
• Islamic pilgrimage — 1994-04-08