# Creating a New Version
Versions can be created for SNOMED CT, ICD-10-UK, OPCS-4, ATC, and Local Code Systems (individually). Reference Sets and Map type Reference Sets can not be versioned separately, since they are part of a SNOMED CT version.
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To create a version:
* Verify that all changes are saved.
* Go to **`Tools > Create version`** or click the**`Create version`** button in the main toolbar.
* Select a Code System.
* Enter a unique version name and a description. If applicable, existing versions are displayed in the section to the right.
* Use the  calendar icon to specify an effective time, i.e. publication date.
* Click **`Finish`** to proceed.
Create new version wizard - selection
Create version wizard - configuration
{% hint style="warning" %}
You can only specify a date that is later than the (date of the latest) previous version. An error message will inform you in this case.
{% endhint %}
Validation error
You can track the versioning process in the **Remote Jobs View.**
The components that were modified since the last publication will be updated during the versioning process by changing the effective time from *Unpublished* to the specified publication date. Components that were not modified will not be updated and keep the original publication date.
{% hint style="success" %}
After the versioning was completed, the create version appears in the  **Code Systems View**.
{% endhint %}
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