Because the Earth is tilted as it moves around the sun. It rotates around the sun every 365.25 days and spins on its axis once every 24 hours. The Earth's axis, a line extending from the Earth's north and south poles is tilted 23.5 degrees. As the Earth reaches a particular point in its orbit about the sun, the northern hemisphere tilts towards the sun while the southern hemisphere tilts away from it. The imaginary line that divides the Earth into the northern and southern hemispheres is the equator. The season when we (U.S.) are tilted toward the Sun is our summer. During our summer, the daylight lasts more than 12 hours because the sun is at it's northernmost position from the equator. During winter, daylight lasts less than 12 hours for the north because the sun is at its southernmost position from the equator. The farther north from the equator you are, the shorter the daylight hours.

Aap sach mein jan na chahti ho ya hum jaise stupid logon ko aur jyada stupid bana rahi ho....aisa lagta nahi ki basic Geographical facts ke baare mein aap wakif nahi ho....Lekin kyun ki aap MAHARISHI DURVASA ke biradariwali ho isiliye aapse mazak karne ko bhi darr lagta hai.....fir bhi itna toh zaroor kahunga ki aap delhiwalon ko kuchh jiyada kaam par lagane ka ye Suraj Chahu ka sazis hai.....

Kyo ki suraj chacha sardiyo mai chuttiya bita ke aate hai garmiyon mai double duty de kar bhar payi karte hai

Kyonki surya adhik samay tak nazar aata hai ya nikala rahta hai

Due to planetary positions and sun position changes.

Prakriti hai uski marzi

Thodi der baad poochna, Muh me Daant kyu hotey hai, Ungliyaan kyu nahi....? .ji

Surya uttarayan hone ke kaaran uday sheeghra aur ast der se hota hai

To value the night!

Is liye kiyoun ki sardiyoun main chote hote hain..........lol.......