Interesting Fact abt International date line:

International date line extends from 180 degree meridian extending from pole to pole .It usually marks the place on the earth's surface where a new date begins.
The interesting thing here is that this line is not straight.It usually follows a 180 degree meridian of longtitude for most of it's distance but goes zig zag in someplace.U may wonder the reason for what this is taking place.This happens in order to avoid land and to leave island groups wholly on the same side of the line.For exsample it curves east in the Bering strait which is located between Siberia and Alaska.This ziz zag pattern takes place in several areas.