Why is the longest day of the year on 21st June? Know the real scientific truth behind this

New Delhi: From both astronomical and spiritual point of view, June 21 is considered very special and unique for the whole world. Even in the year 2026, the longest day of the year is falling on Sunday, 21st June. On this special date, sunlight remains on our earth for the longest time compared to normal days. In the language of science, this amazing astronomical phenomenon is also called ‘Summer Solstice’, which surprises the whole world every year in the month of June.

What is the biggest specialty of June 21 and the secret of the shadow?

According to the rules of astronomy, the day lasts for approximately 13 hours 58 minutes on June 21 in India. This means that the bright sunlight remains directly on the earth for about 14 hours. This is the biggest reason why it is called the day with the longest day and shortest night of the year.

Another very interesting thing about this day is that during the afternoon, at certain places, the sun reaches directly above our heads. Due to the sun being directly above the head, the shadow of a person becomes very small. At many places, people feel as if their shadow has completely disappeared.

After all, why is the longest day on 21st June?

According to scientists and space experts, along with revolving around the Sun, our Earth also continuously rotates on its axis. But the thing to note is that the Earth is not absolutely straight on its axis, rather it is inclined by about 23.5 degrees. Due to this unique inclination of the Earth, the weather changes in our country and the world and due to this the length of day and night also keeps increasing and decreasing.

Every year on June 21, the Earth’s Northern Hemisphere is most inclined towards the Sun. Due to this special geographical location, the direct rays of the Sun fall on the Tropic of Cancer and the Northern Hemisphere receives sunlight for the longest time. This is the real reason why most of the countries in India, America, Europe and Asia experience the longest day and shortest night on this day.

What is the deep connection between June 21 and International Yoga Day?

International Yoga Day is also celebrated with great enthusiasm on 21st June in hundreds of countries around the world including India. There are very solid reasons behind this, both scientific and spiritual.

According to religious and astrological beliefs, from this time the Sun God starts moving from Uttarayan to Dakshinayan, which is considered a very auspicious period for starting yoga, meditation and sadhana. According to our mythology, after this summer solstice, Lord Shiva for the first time gave the divine knowledge of yoga and spirituality to the Saptarishis on the beautiful banks of Kantisarovar Lake. For this reason, the God of Gods, Mahadev, Lord Shiva is also called Adiyogi and Adiguru of the world.

Do these auspicious measures on 21st June and get positive energy

It is believed that on this day the level of positive energy in the universe is very high. Therefore, on this day, offering water to the Sun God from a copper pot at sunrise in the morning is considered very fruitful. Along with this, donating red colored clothes or red colored items calms down the defects in the horoscope.

On this day, Surya Mantra or Gayatri Mantra should be chanted with a calm mind. Being International Yoga Day, trying to achieve mental peace through yoga and meditation will be best for your health. On this great coincidence, you should always start new goals and big plans in your life with positive thinking so that you can get success in every task.