Archive category

I have a number of categories for which I know I’ve worked between some date and some date.

For example, I worked for a company from June to September, and I have a rule for it. I still go check up the company’s website, or look at some old code from it, but I don’t want it categorized with the company because, well, it’s not part of the work for this company.

So i’d like a way to archive the class, that is: no new events can be added to it, but old events still exist in it.

Even better, I’d like to be able to provide a start and an end date, and only the events matching the regex in that timeframe should be considered as part of the class.

Thanks, a-w is incredible.