Bit of context: We're creating an installation for a museum that features a story that is happening over hundreds of years. We're using Timeline to trigger actions in our scene, and our team would like to be able to customize the unit of measurement from frames/seconds on the Unity Timeline to be years. Being able to change to the custom years setting would simplify the workflow for our design team. Crudely drawn image for added context There is an empty section in the Timeline Settings called Custom, which may have been meant for a purpose similar to this. Are custom units of measurement going to be a feature of Timeline or is some other work around possible?