The days between the last day of one school year and the first day of a new one used to last an eternity. Each was full of distinct moments—discovering a bird’s nest, racing your brother through the woods, a chocolate popsicle savored until the last liquid drop. Winter vacations, too, were a great quiet eddy of time, full of delicious days with new toys.  And now? If you’re like many adults, you may feel that time passes more quickly than you can grasp it. In a 2024 survey , psychologists found