Historical clue formulations

• "Hasta ___!" — 2020-09-23
• "Hasta ___" — 2019-01-06
• Later, to Luis — 2013-12-12
• "Hasta ___" — 2012-01-18
• "Hasta ___" — 2008-08-03
• See 65-Across — 2005-09-04
• "Hasta ___!" — 2001-06-28