Steps to Reproduce

http://zkfiddle.org/sample/3u5ohi5/1-Dates-newInstance-returns-an-incorrect-year-when-the-year
run the fiddle with 8.6.1

Current Result

if the input year is 99 (less then 100)
the return year is 1999

Expected feature Result

should return 99

Debug Info

see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/UTC
the Date.UTC() behavior.
Years between 0 and 99 are converted to a year in the 20th century (1900 + year); for example, 95 is converted to the year 1995.