* Breeding season: Horses are seasonal breeders, meaning they are most fertile during certain times of the year. The breeding season for most horse breeds is in the spring and early summer. This allows the foals to be born in the spring, when the weather is warmer and there is more food available.
* Gestation period: The gestation period for horses is approximately 11 months. This means that if a mare is bred in the spring, she will give birth to a foal the following spring.
However, it's important to note that:
* Some breeds: Some breeds of horses, such as Arabian horses, may have a slightly longer breeding season and foals can be born later in the year.
* Individual variation: There can be some variation in the timing of births based on individual mares and their breeding history.
Overall, spring is the most common time of year for horses to have foals.