We’re considering how this could be implemented across the group identity.Bob Sievert, CIO NASPO commented
Have significant issue with the default of Pacific Time for the timezone when using Office 365 Groups with our organization. We have staff across the country and our official timezone corporately is Eastern. So having a value of Pacific time is problematic and the fact that we cannot either set the timezone when creating the Group or change it after the fact creates significant confusion for our staff. Need a way to let the Admin of our account change the timezone.