If you wish to change the calendar slug in the URL, the easiest way is to use a 3rd party plugin called Custom Post Types Permalinks.
More information:
https://en-ca.wordpress.org/plugins/custom-post-type-permalinks/
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WordPress Plugin (v.2.6.8 and older + old platform)
If you wish to change the calendar slug in the URL, the easiest way is to use a 3rd party plugin called Custom Post Types Permalinks.
More information:
https://en-ca.wordpress.org/plugins/custom-post-type-permalinks/