It’s not going to be easy. I think you need four columns - post, post date, event date, and event.
~ ~ ~ ~ ~
It sounds as though you are describing a spreadsheet.
Last winter, AzNASCARfan posted a link to this, but I have been unable to find the update to it.
https://app.smartsheet.com/b/publish?EQBCT=6588bf56d814417bb759beca4fc52232
This is not a ledger, but has a very complete summary of context of daily events wrt Q [takes a while to load]:
“Book Q”
http://irc.qclearancearchive.net/02.%20QMaps/Q’s%20posts%20-%20CBTS%20-%207.5.0.pdf
A few weeks ago, I thought I saw another spreadsheet link and I thought I captured it, but cannot find it now.
A FR ledger/spreadsheet would be a helpful item - a VERY large job - but worthwhile.
This one
http://irc.qclearancearchive.net/02.%20QMaps/Q’s%20posts%20-%20CBTS%20-%207.5.0.pdf
gives “404 not found”.