Geography
The Historical Evolution of the International Date Line
Quick fact
The International Date Line is not a straight line; it zigzags to include island nations like Kiribati and Samoa on the same side, and in 2011 Samoa jumped across the line by skipping an entire day to improve business ties with Australia and New Zealand.
Why this is interesting
You fly from Fiji to Hawaii and suddenly it's yesterday. Why does a single line on the map make time jump back a day?