In A Wrinkle in Time, how do we know that the children have only been gone for less than a day each time they leave? Give textual evidence.

During their journey, Meg, Calvin, and Charles Wallace travel to many different planets. They visit an unnamed, two-dimensional planet, Uriel, the planet where they meet the Happy Medium, Camazotz, and Ixchel. However, they really haven't been gone that long. The ladies (Mrs. Whatsit, Mrs. Who, and Mrs. Which) tell the children that they have created a "time tesser" to ensure that, if all turns out well, they would not be missed. This is shown in the final chapter. When Meg, Calvin, and Charles Wallace return to their home and current time period, they tesser and land in the middle of the twins' vegetable garden. A great family reunion ensues as Meg has saved her family through the power of love. Their mother is obviously thrilled that Father has returned and was unaware that Meg and Charles were even gone.