I think we need to poll the voting members to determine whether anybody insists on having struct tmx in C9x. If not, since there has been some formal objection to it, backing out the struct tmx related changes seems like an appropriate way to respond to (adverse) public comment. Personally I'd rather see a completely satisfactory technical solution than layering on a still-not-satisfactory solution. Since I doubt the former can be done within the C9x schedule, leaving <time.h> pretty much the way it was in C89 seems proper.