The slider input supports datetime objects for min/max/value. However, datetime objects don't work for the `value` parameter of `ui.update_slider`. * [Repro link](https://shinylive.io/py/editor/#code=NobwRAdghgtgpmAXGKAHVA6VBPMAaMAYwHsIAXOcpMASxlWICcyACAEygrLrgB0J+AM0bEYLAM4ALGhGws6DZiwCC6PC0ZwohbgDc46zRDZxG6gK41+-CMQDuLALztOcbvAwcuPDLbsAKAEp+AGIWACVic2MWMmIWCC1NcVZxOBJjG3sWAFpnLzcfdzgTABsyKH8YGkIRNIy2cUc-DGra4nrSNmCBaHQAfUsnFkssKABzOH7BUss2f34WJZGaDBlUczJ+7W5SfoAjTbiIBbBkt158FkuAOXtLwLxF5dH1zf7xUpoTRgWIZYB1zAxXElye-0BS0uABUeKD8M9IX5ci5vB5imUKv4ONgmgBGR6IwF+cGQpYkokA4rTJgwTiOS4AUgAEohGQBZNkAZTBRMJEKWoyiZA2WwoAA8tvpGPtOHRTmRJQ9wT1rMY4IIJKZpf43mR1MLReo0uJxDRSIFEESAAKGzY2ow-DASshEkyaxVkIJWgWAzRkcyMf5651woJqgHWzQ7Gj6DAAUUEgnSrt9Ua0OljcAwcH05F1EFFGHOZB6APdGjgaTFPG9lJeq3MqAKHy+PwVcLBLF0UFmcGa9lVvTQqGGqlQ-hHgxoxu1ph6YAAvgBdIA) * [Reference implementation from Shiny for R](https://github.com/rstudio/shiny/blob/6fc06281bdfea3d2afa5582119469f15d2eed5fc/R/update-input.R#L443-L467)