@brandon @gourd For example, here is the schedule page for "Games Done Quick", a biyearly event I am a fan of.
https://gamesdonequick.com/schedule/48
You'll notice the times are automatically shown in your local time zone. Because the page assumes this timezone feature will work, it doesn't *say* what timezone the times are listed relative to. Without timezone reporting, the page would probably default to GMT or something and be poorly usable.
@brandon @gourd This becomes more problematic if you consider a page which rather than being for entertainment is something where the time is critical, for example an airplane booking site.