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, 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.