The presence of pigs or sheep does not determine the time of day. The time of day can be determined by looking at a clock or through other means such as observing the position of the sun or the darkness of the sky.
The information provided, "Three pigs on a farm, three on land," does not indicate the current time of day. The presence of a sheep does not provide any additional information to determine the time. Therefore, it is not possible to determine the time of day based on the given information.
