Ubuntu 4.10 sounds like the tenth update to version four. It was not. There was no Ubuntu 4.9, no 4.2, and no long march through 3.x.
The number was a date: October 2004. Ubuntu has been putting the calendar on the box ever since.
That first release arrived on October 20, twenty-two years ago today, with the codename Warty Warthog. The name admitted that a first release would have a few rough patches. The number made a different promise: another release would follow in six months, and you would be able to tell roughly how old it was before reading a page of documentation.
A version number that refuses to brag
Software versions usually describe ancestry. Version 2 follows version 1. A jump from 4 to 5 may announce a redesign, a compatibility break, or simply a marketing department becoming restless.
Ubuntu’s numbers describe delivery instead. The project’s current release-cycle guide says releases are versioned by year and month. So 24.04 arrived in April 2024, and the newly released 26.10 arrived in October 2026. The dot looks mathematical, but 26.10 is not twenty-six point one. The final zero matters.
This makes the sequence slightly odd and remarkably useful. Ubuntu 9.10 was followed by 10.04, which looks like a downgrade if you read the numbers as decimals. Ubuntu 23.10 was followed by 24.04. The version advances because time advances, even when ordinary arithmetic objects.
It also makes missed dates visible. The project normally ships in April and October, every six months. Ubuntu 6.06, Dapper Drake, is the famous exception: it arrived in June rather than using the usual April slot. The calendar was not decorative enough to lie for.
The first announcement already contained the system
Mark Shuttleworth’s Warty Warthog announcement already contains most of the release system that survived. It promised one installation CD, free shipping for shrink-wrapped copies, support for x86, AMD64 and PowerPC machines, and eighteen months of security updates. The desktop included GNOME 2.8, Firefox 0.9 and OpenOffice.org 1.1.2.
Some of that belongs unmistakably to 2004. Mailing free CDs around the world was a sensible distribution network when broadband was uneven and an operating system image was an inconveniently large download. Firefox had not yet reached version 1.0. The announcement sent users to an IRC channel on Freenode for help.
But the six-month rhythm was there from day one. The announcement even named the next release, Hoary Hedgehog, and said it was due six months later. Ubuntu was not merely shipping a Linux distribution. It was publishing a clock.
Twenty-two years later, the clock still works
Ubuntu 26.10, Stonking Stingray, arrived on October 15. Its feature list includes a locally processed speech-to-text preview, post-quantum package signing, Rust-based core utilities and Linux kernel 7.3. The release announcement gives it nine months of maintenance, rather than Warty’s eighteen.
The technology, support policy and method of delivery have all changed. The label has not. Put 4.10 beside 26.10 and you can read twenty-two years of elapsed time without knowing which kernel, desktop or packaging argument happened in between.
Calendar versioning has a limit: it tells you when software shipped, not whether an upgrade is safe or how large the changes are. You still need release notes for that. But it answers one question that ordinary version numbers often turn into archaeology: How old is this thing?
Ubuntu 4.10 never meant the project had already become mature enough for version four. It meant the first public release had arrived on schedule. For a newborn operating system called Warty, that was the more confident claim.