Why are the last 4 months named in the shapes?

Answer 1

The last four months are actually named for numbers, not shapes.

September - Latin root is septimus for seven.

October - Latin root is octus for eight.

November - root is novus for nine and

December - decus for ten.

Before you ask, I know these are the months we consider 9,10, 11 and 12 respectively. When the calendar was first created, it began with March, named for Mars, the Roman God of War.

Hope this helped.

The last four months are actually named after the Latin numbers for 7, 8, 9 and 10 respectively. (So were the shapes you have in mind so your confusion is understandable. Why 7 - 10 rahter than 9 - 12? The calendar originally began in March, not January. They are named after shapes. The names come from latin numbers. Sept is seven, Octus is eight, Novus is nine and Deci is ten...so the last four months in English come from the latin numbering system.