For those of you who didn't know, I love Stardew Valley. I have 100s of videos on YouTube at jetrecords226. There is great news coming for long term players of the game. There is a new 1.3 patch update. Listed below are all the updates straight from the developers mouth, Concernedape.
Multiplayer
Shortly after you begin the game, Robin will offer to build up to 3 cabins on your farm. Each cabin will house a farmhand, controlled by one of your friends.
Farmhands can do almost anything the main player can do. They can farm, mine, fight, fish, forage, marry NPCs and take part in festivals. Each player has their own inventory. When a farmhand is not connected, their inventory can be managed through a chest in their cabin.
Certain decisions can be made only by the main player: when to sleep, when to start and end festivals, and whether to side with Joja, for instance.
You won’t need to set up a server to run multiplayer. Friends can be invited onto the farm through Steam. The invite mechanism for non-Steam versions is TBD, but likely to be similar in most cases.
A lot of players have requested player-to-player marriage. It’s an idea we like a lot, and want to make available as a feature. Player-to-player marriage won’t use the mermaid pendant, but rather an alternative method that requires a similar amount of effort to wooing an NPC. We’re still working out what that will be.
Local multiplayer, split-screen and PVP are not planned at this point. Other Rumored Features
It's confirmed that all updates will come to PC first then to console later. The expected timeline for the update is confirmed to be Spring 2018, so any time between March and May. There will be a boat in the game. It's not confirmed on what the boat will do. Some speculate that the boat will take you to a new area like the bus, some say the boat will be a new vendor like the cart lady in the woods. Either way it will be a new addition to the game that promises more new content.
There will be new community events and achievements with NPC. There is a confirmed new event for Winter so far. There are not any specifics on what it is or related to.
I touched base earlier with the Multiplayer features. There will be an option to marry you multiplayer friends, and goals to complete in order to woo them like the difficult NPC's.
There are new decorations and signs that will be added to the game from the beginning, and you will not have to unlock.