I use timestamps like this (a20180825144949) with the help of TextExpander. With spotlight I search the system for that timestamp to find the thing I want to link to. This allows me to for example link a Reminder to a certain note in Apple Notes or link one note in my journal to another note in my journal. The best part is that I can put the timestamp anywhere in my note and when I search for it I get taken to the exact spot in the note. Plus, its just plain text and works on most modern OS’s. I wrote about it here: A clever way to link Notes and Files with TextExpander
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