Note: The default ITS GitLab runner is a shared resource and is subject to slowdowns during heavy usage.
You can run your own GitLab runner that is dedicated just to your group if you need to avoid processing delays.

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ArcGIS Large-Scale Time Sliders

This example code demonstrates how to create an ArcGIS Online map with time sliders for a non-standard or large-scale date range (for example, dates that extend to BCE).