HSA partial year coverage

Hi,

I was on a 2020 HDHP Family coverage and contributed the maximum amount.  I left my previous employer on December 4, 2020 and started with my new employer on December 7, 2020 with a Non-HDHP.

Is this considered a partial year because I was not on the HDHP until December 31, 2020?

Thanks,

Mike