Thanks for trying it out! This is unfortunately not possible as of now and is one of th high-priority tasks to parse timestamps and datetimes, which is now incorrectly parsed as a string (Categorical). I'm using Papa Parse to load CSV data and I will likely need to add a custom parser on top of it.
You might also want to support a Unix timestamp as input, i.e. an integer or decimal number of (mili|micro|nano-)seconds since the Unix epoch. No need to worry about messy date parsing there.
Some of those plans are mentioned in my blog post reflecting on building this app: https://kengoa.github.io/software/2024/11/03/small-software....