Two Bullocks

The Two Bullocks is one of the Star Signs of the Old World. It is the Sign of Fertility and Craftsmanship, appearing as two oxen, and is in Ascendance during Midsummer. People born under it are known to be fertile, and skilled.

Overview
There seems to be a great boom in production of just about everything in the Empire when this constellation is full. Crops tend to grow plentiful and livestock is fertile. Artisans produce large quantities of goods. Many children are conceived. Characters born under this sign show great creativity and are very productive. Whether they’re designing a steam tank or improving the crop production of their town, these individuals are keen to help out however they can.

Source

 * Warhammer Fantasy RPG 2nd ED -- WFRP Companion pg. 44