Days And Years
29th September is celebrated as

International Tiger Day
World Heart Day
World UFO Day
World Hepatitis Day

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Days And Years
India Celebrates February 28 every year as 'National Science Day' because on this day

first Indian Space craft was launched
Vikram Sarabhai was born
Nehru laid the foundation of Science labs all over India
in 1928 C.V. Raman discovered what was later called the 'Raman Effect'

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