I back this idea too - currently working across 3 time zones all in VERY different places across the globe and my brain hurts figuring out the time differences for our social posts so that they hit at the same time as the EDMs and the blog posts. Would be great to be able to assign timezones to users (would be great for teams, too but not if you re part of more than one team across various timezones - should the multiteam function every happen).