x-Axis formatted for date not displaying correctly

x-Axis formatted for date in both data pull and in the chart, yet the dates are all coming up with the wrong year. All are ending in 00 instead of the correct year 19. Data range for x-axis is date (m/dd/yy) with dates such as 1/6/19, 1/13/19 etc, however the x-axis is charting as 1/1/00, 1/2/00. Why?