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C times C, divided by IV, 3 letters
End of the 25th century, 3 letters
L squared, in Roman numerals, 3 letters
Mid-millennium year, 3 letters
Year around the middle of our millennium, 3 letters
2,600, in Roman numerals, 4 letters
About six centuries hence, 4 letters
Early Atari model, to Romans?, 4 letters
End of the 26th century, 4 letters
Old Atari model, in old Rome?, 4 letters
Early date in the 27th century, 6 letters
Mid-27th century date, 5 letters
11 cubed then doubled, in Roman numerals, 8 letters
Beginning of the 26th century, 4 letters
Early 26th-century year, 4 letters