static ZoneOffsetTransitionRule readExternal(DataInput in) throws IOException {
int data = in.readInt();
Month month = Month.of(data >>> 28);
int dom = ((data & (63 << 22)) >>> 22) - 32;
int dowByte = (data & (7 << 19)) >>> 19;
DayOfWeek dow = dowByte == 0 ? null : DayOfWeek.of(dowByte);
int timeByte = (data & (31 << 14)) >>> 14;
TimeDefinition defn = TimeDefinition.values()[(data & (3 << 12)) >>> 12];
int stdByte = (data & (255 << 4)) >>> 4;
int beforeByte = (data & (3 << 2)) >>> 2;
int afterByte = (data & 3);