HSA Contribution - Weird Timing Situation

Hello,

 

I had insurance through my prior employer from January 1st, 2019 - November 30th where I was able to contribute (and did so) to my HSA.

 

I did not have insurance December 1st, 2019.

 

My insurance with my new employer began on December 2nd (and is HSA eligible).  Am I able to finish my 2019 contributions or because I technically did not have insurance on the first day of December...can I not contribute for the month of December?

 

Thank you.

 

Chris