Update the versioning section

Author: renetapopova

modules/ROOT/pages/introduction.adoc

@@ -285,11 +285,15 @@ For more information about what data is collected, see link:https://neo4j.com/do
 [[versioning]]
 == Versioning
 
-Neo4j uses semantic versioning (link:{semver-uri}[Semantic Versioning Specification 2.0.0]).
-Given a version number `MAJOR.MINOR.PATCH`, the increment is based on:
+2025.01.0 introduces a new calendar versioning (CalVer) for the Neo4j server instead of semantic versioning (SemVer), which was previously used.
+The new versioning format, *YYYY.MM.Patch*, is based on the year and month of the release, for example, 2025.01.0, 2025.02.0, and so on.
+The patch number is incremented for each release within the same month and reset to 0 at the beginning of each month.
 
-* `MAJOR` version - incompatible API changes towards the previous `MAJOR` version.
-* `MINOR` version - functionality in a backward-compatible manner.
-* `PATCH` release - backwards-compatible bug fixes.
+Some of the releases will be designated as long-term support (LTS) releases.
 
-Neo4j’s fully managed cloud service link:{aura-uri}[Neo4j Aura] uses only `MAJOR` versioning.
+link:{aura-uri}[Neo4j Aura] will always be on the latest version of the Neo4j server.
+
+== Operations Manual versioning
+
+The Operations Manual is versioned according to the calendar version of the Neo4j server.
+For example, the Operations Manual for Neo4j 2025.01.0 is versioned as 2025.01.0 and reflects the features and changes in that release.