v.18.1Improvement

Updated Release Version Numbering Scheme

Published: November 25, 2025

Changed the numbering scheme for release versions. Now the first part contains the year of release (A.D., Moscow timezone, minus 2000), the second part contains the number for major changes (increases for most releases), and the third part is the patch version. Releases are still backward compatible, unless otherwise stated in the changelog.

Changed the version numbering scheme to include the release year, major change number, and patch version.

Why it matters

To provide a clearer and more informative versioning system that reflects the release year (based on Moscow timezone, minus 2000), major changes, and patch updates. This helps users quickly understand the age and significance of a ClickHouse release while maintaining backward compatibility unless otherwise noted.

How to use it

Users can identify ClickHouse versions by the new format where the first number indicates the release year (A.D., Moscow timezone minus 2000), the second number denotes the major change version, and the third number represents the patch version. No special action is needed; this is an informational change to version numbering.