/lit/ - Literature

Is there a good program for timelines that's reorganizable? I've got like 4 story arcs that cross paths in a few places but no hard dates yet. I would like to be able to at least drop events on the timeline and click and drag to reorder them. I'm writing with Obsidian but its timeline plugins seem to use tags on files and would be better suited to timelines with concrete dates.

My dream app would be something that lets me
>lay out multiple parallel timelines
>be able to pick up and reorder entries on a timeline easily
>be able to move entries on a timeline without reordering, such that sliding an event back in time 10 years would push everything else back 10 years instead of moving the event behind everything that happened within the 10 years preceding it
>link events across timelines so that if the same event is on two timelines any update on one timeline is reflected on all other timelines

I'll be grateful if anyone knows of anything that can do this.
I'm starting to consider just brute forcing it in Excel because I know I can get the behavior I want out of adding and deleting columns and shifting multiple columns at a time.