When was the first JL built?

[mgroeger]

I just got my build sheet and the build date was 12/19/2017. We bought the Jeep off the dealer's lot on 1/31/18 with 34 miles on it.
I wonder when the first one was built.

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[SandBucket]

I believe the first 4 door JL was produced in November 2017. I don't know the exact date.