Sorry I'm super late at answering this. Shadow Lord shirt and Echad Ring are both considered part of Event runs since they are limited availability items. Vali-whozit and Mihli are available 100% of the time and are allowed for both categories. If you have any questions you need answered quicker, I would suggest checking the Final Fantasy Discord server as you are much more likely to get a quick response there: https://discord.gg/twEH8U2

If nothing else, I'd suggest just assuming an Event campaign is active as there's only a few times a year where there's not one active and when you submit your time, either Korvana or myself with move it to the correct location.