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NAV / BC has a historical restriction / feature for entering dates with two digits:
If the date you want to enter is in the range 01/01/1930 through 12/31/2029, you can enter the year with two digits; otherwise, enter the year with four digits.

Please change this behaviour in future to become more applicant for users and developers (CREATEDATETIME etc.).
Category: Development
STATUS DETAILS
Needs Votes
Ideas Administrator

Thank you for this suggestion! Currently this is not on our roadmap. We are tracking this idea and if it gathers more votes and comments we will consider it in the future. Best regards, Business Central Team