Hourly Stem
- water
 
Hourly Branch
ox

 

How to calculate the stem & branch of the Hour

  • Take the daily stem and lookup the stem and branch of the first double hour
  • If daily stem is S1 or S6;       1st double hourly stem = 1
    If daily stem is S2 or S7;      1st double hourly stem = 3
    If daily stem is S3 or S8;      1st double hourly stem = 5
    If daily stem is S4 or S9;      1st double hourly stem = 7
    If daily stem is S5 or S10;     1st double hourly stem = 9
  • Double hourly stem = Add number of double hours to the 1st double hourly stem. (after S10 the stem cycle starts again with S1…)
  • Double hourly branch = Add number of double hours to 1 (the 1st double hourly branch,  23:00-01:00) (after B12 the stem cycle starts again with B1…)