What is the theme in Dandelion Wine by Ray Bradbury?

As in many of his other works, Bradbury explores time in Dandelion Wine. The book begins on the first day of summer, 1928, and continues on chronologically until the last day of summer of the same year. This is calendar time, the day-by-day progression throughout the year. Bradbury underscores this progression through the scenes where the boys and Grandfather make dandelion wine, each bottle labeled for each day in the summer. As the number of bottles increases, the days of the summer dwindle. Calendars and clocks, however, only represent the kind of time that is measurable; these devices divide time up into ever smaller, equal divisions.