2040 date limit

The 2040 date limit is a forthcoming date-related software limitation in Apple's classic Hierarchical File System (HFS) and HFS Plus.

HFS and the Date & Time control panel from Mac OS 9.x can manage dates up to February 6, 2040 at 06:28:15, after which the clock will cycle back to January 1904. Apple has since been migrating modern macOS users to its APFS file system, which does not have this limitation.