How to create a timeline

Hi there!
My question is a little bit offtopic but I hope there is someone skillful enough here to help me out. I want to create a zoomable timeline with entries of different priority so when I zoom out, only main information remains and when I zoom in, more details show up. Just like when you zoom in and out of a map. The timeline is meant to show different historical periods and events. I couldn’t find sattisfying engine anywhere on the web so I decided to ask around here hoping to find and expert here.

My preferred timeline tool is Aeon Timeline (Mac or PC)… https://www.aeontimeline.com/

Before that I used SIMILIE Widgets (Online)… http://www.simile-widgets.org/timeline/

Another one with quite a few tricks up its sleeve is ChronoZoom (Online)… http://join.chronozoom.com/