Historical clue formulations

• Yesterday, in Spanish — 2024-11-07
• Yesterday, in Spanish — 2024-01-14
• Yesterday, in the Yucatán — 2010-03-24
• Philosopher who promoted logical positivism — 2008-11-29
• Mañana's opposite — 2001-02-10
• Philosopher A.J. _____ — 1994-09-12