You can use a date as a "link" in a notebook. A normal person does not create that many different entries per day. You can add a keyword to the notebook margin as well if you feel particularly systematic (then a link/reference would be 18jul23 for example).

This sounds time-consuming, is it?

I dont see myself following permanent links by timestamp. It is so time-consuming and error-prone, I would drop the whole thing immediately. I know myself this far anyway^^

The idea is that it is a _good thing_ that it is time consuming, as thinking about the connections between the notes _is_ the actual productive work that you have the system for.