Countdown timers — saved in your browser.
Project Gorgon runs several things on a real-world clock rather than the in-game one, and the game does not remind you about any of them. These are plain countdowns for those: start one, close the tab, come back and it is still counting. Everything is kept in your own browser. Nothing is sent anywhere, and nothing is tied to a character or an account, so the timers follow the browser rather than the toon.
3h and 8h loot are the two respawn windows people most often want to be told about. 4h mushroom box is the mushroom-growing cycle. For which mushrooms are worth planting right now, the mushroom farming page reads the current moon phase, since growth depends on it. Any other duration goes in the hour / minute / second boxes with a label of your choosing.
Anything on the game's own schedule lives elsewhere, because it can be calculated rather than timed: the in-game clock, the moon phase and the recurring world windows are on the clock, the eight moon phases and what each one moves are on the moon page, and community-run events with their own start times are on the server hub.