How to calculate the stem & branch of the Month

• Take the yearly stem and lookup the stem and branch of the first month
• If yearly stem is S1 or S6;            1st monthly stem = 3

If yearly stem is S2 or S7;            1st monthly stem = 5
If yearly stem is S3 or S8;            1st monthly stem = 7
If yearly stem is S4 or S9;            1st monthly stem = 9

• If yearly stem is S5 or S10;            1st monthly stem = 1
• The 1st monthly branch is always 3
• Check the Chinese calendar at which day the first month starts! (beginning of february) and which day the target month ends!!!
• Monthly stem = Add number of months to the 1st monthly stem for each month after the first month. (after S10 the stem cycle starts again with S1…)
• Monthly branch = Add number of months to 3 (the 1st monthly branch) for each month after the first month. (after B12 the stem cycle starts again with B1…)