"Multiple things occur at the same day.", in TB: multiple thoughts are linked to the same date-thought.
So, TB allows to reverse this kind of information: "What happened at ...?", in TB: activate the date-tought, get the linked thoughts.
It's all within the plex.
This TB-navigation won't work if the date is stored as an attribute of a thought.
This TB-navigation does not work with the "Timeline".
As a matter of fact, I'm using date-thoughts for quite some time. I'm really used to it, and, I am not the only one.
Here's a sample:
Thoughts are linked to dates, where the link specifies (e.g. via it's type, and direction) the detail, e.g. born on, died on, was written, has due-date, etc. pp.
There are NO "events".
So, again, my plea to you: please, please, PLEASE discard (sic!) the timeline!
Implement "date" instead, in addition to normal thoughts, types, tags; put in some logic, e.g. intelligent zooming: when a thought is linked to a month (e.g. "2017-12"), it's implicit linked to the appropriate year (e.g. "2017"); provide a "time view".