As a result of the industry I work in (TTRPGs), sometimes I get to do really fun things. Fun things like: Lock myself in a room with a copy of Calendrical Calculations and make a custom timeline maker for fantasy turbo-nerds like myself.

Events are represented as integer minutes since the epoch (0, in this case). Then we use a calendar definition to parse those minutes into readable dates, based on the calendar. This allows us to plot events on a big zoomy Gantt timeline, as well as a standard list and calendar view.

There's still a few things I want to add: Moon tracking for the calendar view, recurring events, maybe some other view modes, etc.

This was a really fun project! It started as a core feature of my product, LegendKeeper. I designed in such a way that it was easy to host as a standalone page, so I did that, too.