Change in Date function behavior – PB Docs 2022

When you use the Date function with a string argument,
PowerBuilder attempts to match the input string to a date format in the
regional settings on the computer. In PowerBuilder 10 and later, if a
complete match is not found, PowerBuilder attempts a partial match. For
example, if you use Date(’01-JAN-1900′) and PowerBuilder finds the
partial match (dd-MMM-yy), PowerBuilder parses the first two numbers of
the year and gets 19. The 2-digit year is interpreted as a year between
1930 and 2029, and the date returned is 1/1/2019.