Longest Day of the Year

Today is the longest day of the Year. Am re-posting this post on this occasion

June 21st,the longest day of the year. This day marks the summer solstice in the northern hemisphere and the winter solstice in the southern hemisphere. That means this is the day of the year with the longest hours of daylight in the northern hemisphere and the shortest in the southern hemisphere.
Let us understand this in simple words.
The earth's axis is tilted 23.5 degrees from earth sun plane. Thanks to the tilt we enjoy the four seasons. For several months of the year one half of the earth receives more direct rays of the sun than the other half.

In summer solstice,the earth's tilt is towards the sun as we can see above.The sunlight strikes more directly to the northern hemisphere making the length of the day longer.
In winter solstice,the tilt is away from the sun and the southern hemisphere enjoys direct sunlight in their summer months. It falls on the December 21st in northern hemisphere which marks the shortest day of the year.