There are 24 hours in any day of the year!
If the question refers to daylight hours, then the location is required.
An entire day is still 24 hours in the summer time.
24 hours.
Spring and summer. The longest day is the solstice - which is the first day of summer.
24 Hours. On summer solstice the earth is tilted toward the sun and it shines continuously at the north pole.
The sun rises at 06.30 hours and sets at 09.30 on a long summer day. That is 16 hours of sun!!
The summer solstice happens. The summer solstice is also the winter solstice in the opposite hemisphere. On the summer solstice (on the northern hemisphere), the northern hemisphere is tilted most to the sun, giving 24 hours of light to the Arctic Circle and 24 hours of darkness to Antarctica on the day of it.
the first day of summer is May 5th, so it'll be 55 days
24 Hours of straight sunlight
June 9 is not a day in Summer, in either of the Earth's hemispheres.
June 21st, 2011... first day of summer. June 20th, 2012... first day of summer. June 21st, 2013... first day of summer. June 20th, 2014... first day of summer. June 21st, 2015... first day of summer.
There are 23 hours and 56 minutes in the longest day - exactly as there are in the shortest day. How "long" or "short" a day is refers to how long there is sunlight in the sky. Many more hours a day in summer, many less hours a day in winter. But the actual length of the day on earth is always 23 hours and 56 minutes.
It could be anywhere from 12 to 24 hours depending on what day and what latitude.