[Java SE] YYYY vs yyyy in Java Date Formatting (Doc ID 3066357.1)

Last updated on MARCH 05, 2025

Applies to:

Java SE JDK and JRE - Version 7 and later
Information in this document applies to any platform.

When formatting dates in a Java application, improper use of 'YYYY' can lead to significant issues.

For example, when using the 'YYYY' format, December 30, 2024, is incorrectly represented as 2025-12-30.

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