Debian 9 Long Term Support reaching end-of-life

The Debian Long Term Support (LTS) team has announced that Debian 9 ('stretch') has 'reached its end-of-life on July 1, 2022,
five years after its initial release on June 17, 2017'. There will be further updates for a subset of the packages in the release through the Extended LTS project. Meanwhile, the LTS team is moving on to Debian 10 ('buster'):

The LTS Team will prepare the transition to Debian 10 buster, which is the
current oldstable release. The LTS team will take over support from the
Security Team during August, while the final point update for buster will
be released during that month.

Debian 10 will also receive Long Term Support for five years after its
initial release with support ending on June 30, 2024. The supported
architectures will be announced at a later date.