What is the meaning of international date line?

(DoD, NATO) The line coinciding approximately with the anti-meridian of Greenwich, modified to avoid certain habitable land. In crossing this line there is a date change of one day. Also called date line.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). international date line. Retrieved September 27, 2026, from http://smartdefine.org/international_date_line/definitions/1962285
ChicagoMilitary Dictionary (DoD). 2011. "international date line" http://smartdefine.org/international_date_line/definitions/1962285 (accessed September 27, 2026).
HarvardMilitary Dictionary (DoD) 2011, international date line, Smart Define, viewed 27 September, 2026, <http://smartdefine.org/international_date_line/definitions/1962285>.
MLAMilitary Dictionary (DoD). "international date line" 4 April 2011. Web. 27 September 2026. <http://smartdefine.org/international_date_line/definitions/1962285>
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