https://www.gamespot.com/articles/pc-xbox-one-pirate-game-sea-of-thieves-beta-dates-/1100-6455994/

Microsoft's anticipated pirate game, Sea of Thieves, is set to launch for Xbox One and PC this spring, but some players will have a chance to go hands-on with the title much sooner. Following a technical alpha in December, developer Rare has announced the dates for its Sea of Thieves closed beta, which is scheduled to take place later this month.

The closed beta begins at 4 AM PT / 7 AM ET / 12 PM GMT on January 24 and runs until 12 AM PT / 3 AM ET / 8 AM GMT on January 29. Players who either joined the Sea of Thieves Insider Program prior to December 1, 2017 or have pre-ordered the title will be able to access the beta. Rare says the beta isn't a sample of the full game but a tailored experience "that offers a true taste of the pirate life."