Yes, I research them almost every evening. I started out just with site-related announcements in the notice block, but then began to add national/international days, birthdays and historic events from several different online sources.
There are always many choices available for each day, and I struggle usually in vain to find birthdays of historic persons related to canoeing. For example, I only recently figured out that Bill Mason was born on April 21.
I will continue to use the notice block for significant site announcements, such as the next fund raiser, which probably will be a year from now.
There is a technical issue with the notice block system. If I make the notice dismissable (hideable), which I almost always do, it will not show up if I use it again in the future for anyone who dismissed it the first time. Members can restore dismissed notices in the Preferences section of their Account settings, but I'm not sure I can force a site-wide restoration of all dismissed notices if I want to use them again.
There are other sorts of notices, such as floating, rotating and disappearing notices, that I have not yet experimented with. My becoming the administrator here was like putting a tractor driver in the cockpit of a rocket ship. There are 10,000 switches, gauges and buttons in front of me, and at first I didn't even know what the labels meant for 95% of them. It's been a challenge but actually interesting, since I don't really have that much else to do.