is it the equator
No, the international date line is a line of longitude, not latitude.
Whether travelling to the West or to the East from the Prime Meridian (zero Longitude) the International Date Line is 180 degrees Longitude.
International Date Line
International Date Line
The major line of longitude located at 180 degrees longitude is the International Date Line.
The International Date Line.
The international date line
The line of longitude where one day ends and another begins is called the International Date Line. It roughly follows the 180° meridian in the Pacific Ocean and marks the transition between calendar days.
the international date line sits on the 180 0 line of longitude in the middle of the Pacific Ocean , and is the imaginary line that separates two consecative calendar days
121 degrees east longitude
The line at 180 degrees longitude is called the International Date Line. It serves as the boundary where each calendar day begins, and crossing it leads to a change in date. The line runs from the North Pole to the South Pole and roughly follows the 180th meridian.
The International Date Line.