 Okay, and we do know a few of the cues, right? So light, maybe? Yeah, so light is the biggest one, right? So light can reset your clock. It's important when you travel to a new time zone to get light in the morning. That's when you are the most sensitive to the light cues and to be sure to put your phone away at night so that you're not giving yourself a light cue at the time that you're supposed to be sleeping.