Historical clue formulations

• "Regardless ..." — 2021-07-31
• "Be that as it may ..." — 2020-01-14
• "Whatever the case ..." — 2015-05-30
• Either way — 2014-10-03
• Nevertheless — 2013-06-01
• "Be that as it may ..." — 2011-02-18
• Whatever the case — 2003-03-02
• Be that as it may — 2001-12-08