The moderator dashboard includes useful tallies of things like flags handled, comments deleted, questions mod-closed, and so on. We can view this information for the current day, week, month, quarter... or all time. Missing from this list is year.
Several times now I have found myself wanting to answer questions like "are we getting more flags than we used to or does it just feel that way?". We can sort of assess this for the recent past by comparing month to quarter, but fluctuations like holidays or current events can throw that off. On the other hand, "all time" doesn't provide the right perspective on sites that are several years old. Being able to see trends over six months or a year would be more helpful.
Why do I want to answer questions like these? Because sometimes it feels like the mod team is doing more work, but maybe the work hasn't changed but we're doing something wrong or need a vacation or something. When perceptions of increased workload lead to the beginnings of conversations about whether we should ask SE for another moderator, I'd like to be able to sanity-check perceptions against data. If our perceptions are off, that's a different problem that we might need to attack in a different way.
Adding a "year" tab to the existing dashboard is one approach. (That seems not too hard.) Adding moderation stats to the mod analytics, so we could see (aggregate, not per-mod) graphs of these events over time like we can for posts, visits, votes, etc, would let us see trends over time including cyclical changes, but might be more work. Maybe there are other ways to share the information with mods too; I'm requesting functionality, not a specific interface. It's just that "ping Shog in TL and ask" doesn't scale.