Older or younger?

One day Kerry celebrated her birthday. Two days later her older twin brother, Terry, celebrated his birthday. How come? What is the logical explanation for this seemingly a fallacy or paradox?


Answer:

At the time she went into labor, the mother of the twins was travelling by boat. The older twin, Terry, was born first early on March 1st. The boat then crossed the International Date line (or anytime zone line) and Kerry, the younger twin, was born on February the28th. In a leap year the younger twin celebrates her birthday twodays before her older brother.