Quote from dylan101 »Quote from TwinfrodoPhoenix »
It does say on the token card is you keep track only after a daybound card enters play.
It says you track day/night once it becomes day or night or a daybound permeant enters the battlefield.
While it would need further clarification, with that reading it becomes night if your turn 1 is play a land pass as you cast no spells and thus day/night needs to be tracked for the rest of the game.
But there is no permanent on the board checking for that to make it night or day. So you either start tracking when a daybound creature hits the table OR when some other effect like a spell or enchantment that doesn't have daybound cares about making the phase day or night, after that point you have to start tracking, but not before.