404s and confusing results for event categories with no upcoming events

[gosko]

On the Events page, if I select 'Award event' or 'Webinar' the server returns a 404 error.

In several other categories, like Workshops the page says 'There are no results' because there are no upcoming workshops, but I think it would be more helpful to display something that says 'There are no upcoming workshops scheduled' but also lists the 5 or 10 most recent entries in that category. Currently you need to click 'Browse archives' and select different years to find events from that year. I can imagine someone trying to find a recent workshop from a previous year without knowing which year, and having to browse by year would be a nuisance.

Maybe the page could be updated to have Upcoming and Past events sections, with Past events listing the most recent 5 or 10 entries?

If that's not desirable it would be good to update the text displayed on pages like the Workshops overview from 'There are no results' to something like 'There are no upcoming Workshops. Use the links below to browse archived Workshop events from previous years.'