>>714908292
Pretty sure you are told by NPCs about the flint thing but even if you weren't the flint description tells you what it does and you know sitting at campfires skips time because you can do so wherever they're placed by the game such as at the stables. The game doesn't literally pop a tutorial screen for every single mechanic and it's by design. You're supposed to power up as a player by expanding your knowledge and experience with the game world. Even despite that there's usually NPC dialogue all over the place that nudges you towards what you need or might want to do and if you didn't figure out that making fire makes you warmer I gotta wonder how you dress yourself up in the morning