League Events
From NSB User Guide
On the main screen of your software is a horizontal calendar detailing by date the upcoming events in your league. Use the vertical slider to the left of the calendar to show events more than one week ahead.
Pay attention to this calendar because it shows you all the run-times for your league events, when drafts begin, when contract signatures are due, when trades open and close, when waivers opens, when you can vote for Cy Young and MVP candidates, and so on.