sentences:  Other languages have terms equivalent to D-Day such as "Hari H" (Indonesian),"Час Ч" (Russian), "Dagen D" (Swedish), ' (Slovenian), ' (Basque), ' (French), ' (Irish), "Tag X" (German), and "" (Romanian).The initial "D" in D-Day has been given various meanings in the past, while more recently it has obtained the connotation of "Day" itself, thereby creating the phrase "Day-Day", or "Day of Days".The earliest use of these terms by the United States Army that the U.S. Army Center of Military History has been able to find was during World War I.