31. World Meteorological Day is marked on:

32. World Tuberculosis Day is observed on:

33. The International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade is on:

34. World Theatre Day is celebrated on:

35. World Sleep Day is observed on:

36. Commonwealth Day (in Australia, UK, Canada, etc.) is celebrated on:

37. International Day of Forests is observed on:

38. World Wood Day is celebrated on:

39. International Day for the Elimination of Racial Discrimination is observed on:

40. World Meteorological Day is marked on:

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