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The team foundation marketplace features the Team Calendar extension (https://marketplace.visualstudio.com/items?itemName=ms-devlabs.team-calendar), which was created by the Microsoft DevLabs team and helps busy teams stay on track and informed about important deadlines, sprint schedules, and upcoming milestones. Team Calendar is the one place where you can view and manage the dates that are important to your teams, including sprint schedule, days off (for individuals or the team), and custom events: