Okay! Imagine we have a clock, and we look at it to know when it's time to do things, like go to the park or have lunch.
When we say, 'We leave at the scheduled time,' it means we have a special time set, like 3:00 PM, when we are supposed to go somewhere. Just like how your favorite cartoon starts at a certain time!
So, if the clock says it's 3:00 PM, that means it’s time to grab our things and go. If we wait too long, we might miss out on fun things, like riding the swings! So, we want to be ready and leave right on time!