Historical clue formulations

• Opposite of día — 2019-02-12
• [See notepad] — 2019-02-06
• Night, in Nogales — 2018-10-02
• Night at the museo? — 2016-12-25
• Night, in Nicaragua — 2016-05-18
• Opposite of día — 2007-07-04
• When to see la luna — 2007-02-09
• Día's opposite — 2006-09-24
• Time to see estrellas — 2006-02-24
• Opposite of dia — 2004-08-01