Given C's ubiquity and (likely) longevity it'll have a Y2k89 problem: standards released in 2089 and beyond will have to change their naming schema and/or avoid being standardized in particular years. ;)
The C standards aren't published at a regular interval of 10 years. They are published as needed or as agreed upon. So it is possible there may be a C standard published in 2089, but highly unlikely.
It's similar to but not quite the same thing as the Y2K problem.