On the Spanish community, a member reported that the add-on did not correctly report the remaining days for leap years.
When pressing NVDA+F12 thrice on January 3rd, 2020, the addon said "362 days remaining" while, as 2020 is a leap year, it should say "363".
Ivan proposed a PR which I have just merged.
Since I don't have access to the addonfiles repo on github/nvdaadons, I could not update the development channel for this add-on.
So don't use addonUpdater to do this update, nor the download link provided on the add-on page on our community website.
Thanks Ivan and Spanish community.
The corrected add-on can be downloaded here:
It will remain in development version for a short time, just long enough to check if other bugs have been detected.