/run TimeManagerClockButton:Hide() TimeManagerClockButton:HookScript("OnShow", function(self) self:Hide() end) GameTimeFrame:HookScript("OnEnter", function() GameTooltip:SetOwner(UIParent) end)
The UI loads the clock at PLAYER_LOGIN so if you wanted to turn this into an addon you would have to take that into account. You would also need something extra if you wanted to be able to toggle it on for any reason.
Disables the Calendar tooltip also.