Fresno Chaffee Zoo shortening summer hours starting August 3Starting August 1, the Fresno Chaffee Zoo is changing its hours to 9 am to 2 pm, shortening the day by two hours. Starting August 1, the Fresno Chaffee Zoo is changing its hours to 9 am to 2 pm, shortening the day by two hours. Starting August 1, the Fresno Chaffee Zoo is changing its hours to 9 am to 2 pm, shortening the day by two hours. Starting August 1, the Fresno Chaffee Zoo is changing its hours to 9 am to 2 pm, shortening the day by two hours. Starting August 3, the Fresno Chaffee Zoo is changing its hours to 9 am to 2 pm, shortening the day by two hours.