

There is also testing, but that is just to place thing in before promoting them to stable so has the same release cadence as stable.
Small point of clarification: Debian Testing is more fluid than Stable. While Stable will not receive any feature updates in its 2-year lifespan (only bug fixes and security patches), Testing does receive feature updates, up to the point where it is “frozen” for the final stages before release as the new Stable. Usually that happens a few months before release.
This is why Debian 13 “Trixie” has some packages that were released toward the end of Debian 12’s lifecycle.
For example, Debian 13 Trixie was released in August 2025, and contains KDE Plasma 6.3, which was released in February 2025. It does not include Plasma 6.4, which was released in June 2025, because that was after the freeze.
So in practice, you can expect Debian stable to have feature releases that are ~0.5-2.5 years behind the latest, and Testing to be 0-6 months behind.







In theory, no.
In practice, yes.