[mlichvar]

The Linux kernel keeps time as a 64-bit integer, but it's in nanoseconds, not seconds. It's a Y2262 problem.

[fluoridation]

That's way easier to fix, though. You just need to fix the kernel's internal structures to keep track of time using two numbers. Y2K was a problem because everyone had to fix their code, not just OSs.

[xboxnolifes]

It'll still be a problem for code that relies on time being 64-bit int of nanoseconds. How do you change the internal representation here without also breaking the API contract for application code?

[re]

The kernel does not have an API that exposes that representation to user code; system calls operate on timespec structs

  struct timespec {
        time_t   tv_sec;        /* seconds */
        long     tv_nsec;       /* nanoseconds */
  };