Explanation

Earth Day is observed on April 22 annually 

The first Earth Day was held on April 22, 1970

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Caledonia is the Latin name given by the Romans to the land north of their province of 'Britannia', beyond the frontier of their empire, roughly corresponding to modern-day Scotland

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ARGOSY means a big trading ship.

Trading ship means a seagoing ship engaged in trade and proceeding to sea on regular voyages, excluding.

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 17

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The Atlantic Ocean, a mass of salt water that covers about one-fifth of the Earth's surface and separates the continents of Europe and Africa in the east from the continents of North and South America in the west.

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Explanation

'infrequent', is an adjective which means 'not occurring often/ rare'.

As it means the same as 'rare', 

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• Shah Jahan, born on January 5, 1592, in Lahore.
• He was the fifth emperor of the Mughal Empire.
• He reigning from January 1628 until July 1658.
• He was the first Mughal Emperor to sit on the Peacock Throne.
• Shah Jahan died on January 22, 1666, at Agra Fort, Agra, India.
• He is buried at the Taj Mahal, Agra, India.
• His full name was A'la Azad Abul Muzaffar Shahab ud-Din Mohammad Shah Jahan.

Explanation

Magnanimous means فراخدلانہ

Generous means فیاض یا سخی