What are the benefits of full-day versus half day?

Both the half-day and full-day kindergarten sessions follow the Massachusetts Curriculum Frameworks and utilize the same curriculum (reading, phonics, writing, math, social learning, etc.) Both kindergartens have art, music, physical education, digital learning, and library during the week. The full-day session will have two 30-minute blocks of music and physical education versus the half-day session which will have one-30 minute block of music and physical education. Both the full-day and half-day kindergartens have a 30-minute lunch block and 15-minute recess block daily.  The full-day program allows for additional time in the afternoon to socialize in a developmentally appropriate environment.