gui-you day pillar

Next door to 壬申 in the cycle, and on the element count much the same: metal feeding water. The twelve stages tell them apart. 壬申 sits at Growth and 癸酉 at Sickness, and the whole difference comes from counting 癸 backward from 卯.

A single stem, 辛, appears in 酉 in the common table, with 淵海子平 and 神峰通考 in agreement. From 癸 it is Indirect Resource. 三命通會 inserts seven days of 庚 ahead of it, and 庚 would read as Direct Resource instead, because its polarity is the opposite of 癸.

Where 壬申 had weapons, this half of 劍鋒金 has tools. 三命通會 卷一 says 癸酉金，金之椎凿, metal as mallets and chisels, and then 喜木及寅卯, pleased by wood and by 寅 and 卯. Chisels cut wood, which may be the logic, though the entry does not give one.