I always new that this is an important day, September 16th!
Optimistic Environmentalist – Not only bad news:
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2019 ozone hole continues to intrigue

Following the discovery of the Antarctic ozone hole in the 1980s, and the resultant international protocols established to reduce the destruction of ozone, the International Day for the Preservation of the Ozone Layer is now marked each year on 16 September to maintain awareness of the human impact on our environment.

CAMS monitors a very unusual 2019 ozone hole

Less than one month into the 2019 Antarctic ozone hole season, the Copernicus Atmosphere Monitoring Service (CAMS) has observed that this year’s hole is currently decreasing in size and will rapidly continue to do so over the next three days to reach an unprecedentedly small area for this time of year. The forecast also indicates that, after this minimum, the hole will slowly increase in size again. The current expectation is that the 2019 ozone hole could have the smallest area of any Antarctic ozone hole since the mid-eighties.

=> https://atmosphere.copernicus.eu