date window

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A 100-year range that generally spans two centuries, specified with a beginning and ending date (for example, 1928-2027). The beginning date of the window becomes a threshold to which a two-digit year shortcut is compared in order to interpret the century for the date.
For example, if the date window is set to be 1928-2027, the threshold is then "28." A two-digit shortcut less than 28 will be interpreted as 20xx (the later century). A two-digit shortcut greater than or equal to 28 will be interpreted as 19xx (the earlier century). In this example, if a user enters the dates 1/1/26, 1/1/27, 1/1/28 and 1/1/29, a program using this date window would interpret these dates as 1/1/2026, 1/1/2027, 1/1/1928 and 1/1/1929.
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