For years, I've kept a diary where I see multiple years on the same page (this one, among others). I've decided I would enjoy going through my older ones and typing them into some sort of document. How should I do this? I'd like to keep the one day / multiple years format.
I have a Mac. This would be for myself; I don't plan on sharing it in any way. I've deliberately kept it on the boring side, though, so I don't need any more security than my computer already has. I'm up for buying software, but I don't want to use anything so niche that I can't open the file in ten years.