Chinese calendar · Institutional reference
Heavenly stems and earthly branches
Hong Kong Observatory
The ten stems and twelve branches form a sixty-pair cycle. HKO lists every pair and distinguishes the year, month, day and hour uses.
Open the source text ↗Where to begin
Begin with the ten and twelve names, then Table 2. The first pair is Jia-Zi; the two sequences advance together.
Keep in mind
A calendar label alone is not a full Eight Characters or Four Pillars chart. This source identifies the sequence; the phase pairing is checked in a separate historical text.