Days on Mars WSJ Crossword Clue
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The most common and recent 4-letter answer for "Days on Mars" is SOLS.
On Mars, a 'sol' is a solar day, which is slightly longer than an Earth day. The term 'sol' is used by scientists and space missions to refer to the duration of a day on Mars.
This clue was last seen in the WSJ Crossword on September 16, 2025.
A sol is a solar day on Mars, approximately 24 hours and 39 minutes long.
The clue “Days on Mars” is a classic crossword staple, frequently appearing in puzzles like the WSJ crossword. For the puzzle dated September 16 2025, the definitive 4-letter answer is: SOLS.
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