Visiting some friends this weekend who are in the Fallout 76 Beta, and I noticed something about the scheduled times for tomorrow (the 4th) on the beta's start screen. It said it starts at 2pm EDT / 6pm UTC. However, most of the US switches to EST in a few hours. 6pm UTC will be 1pm Eastern tomorrow afternoon, so it might become available earlier than expected. The Bethesda Twitter just mentions "Eastern" without specific reference to Daylight or Standard, but it could be earlier if they're using UTC behind the scenes. It became available about a half hour early today, but could possibly be 60-90 minutes early tomorrow.
One would hope they have people smart enough to have posted the Standard time for that day instead of Daylight. But sadly it's probably the same idiot that sent the email yesterday about friend codes. They posted EDT and PDT for today's beta, and they were off by an hour. SMH.