Carrie Lam is Hong Kong’s new Chief Executive.- Red is the colour that always appears on the outside edge of a rainbow.
- April Fool’s Day can be traced back to the reign of Charles 1 of France with the reform of the Gregorian calendar in 1582.
- Hecate is the chief witch in Macbeth.
- Swiss psychologist Carl Jung originated the concept of introvert and extrovert personalities.

