The estimated foaling date is calculated using the following formula:
\[ \text{Foaling date} = \text{Mating date} + 338 \text{ days} \]
For the full range of possible foaling days:
\[ \text{Earliest possible foaling} = \text{Mating date} + 331 \text{ days} \]
\[ \text{Latest possible foaling} = \text{Mating date} + 346 \text{ days} \]
