Historical clue formulations

• JUPITER — 2021-03-28
• Largest moon in the solar system — 2020-08-05
• Largest moon in the solar system — 2018-01-14
• Largest moon in the solar system — 2012-11-25
• Moon on which Heinlein's "Farmer in the Sky" is set — 2000-04-14
• See notepad — 1994-09-28