C                 181 lib/common/iso8601.c     int C = (year - 1) - YY;
C                 183 lib/common/iso8601.c     int jan1 = 1 + (((((C / 100) % 4) * 5) + G) % 7);
C                 185 lib/common/iso8601.c     crm_trace("YY=%d, C=%d, G=%d", YY, C, G);