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![](https://startrek.website/pictrs/image/ccbc1d32-aa21-4d26-bb28-42e63bd83083.png)
Months are one of the best ways for a low-tech/pre-tech culture to keep track of dates (using the Zodiac for something it can actually do—act as a calendar you can see no matter where you are in the world).
Keeping them around is a sensible fail-safe in case some nuclear power sets us back into the dark ages.
It’s like in Unpretty, that 90s song by TLC: