/// <summary>
/// Returns the list of NPCs that have the given birthday. Returns null if no NPC matches the date.
/// </summary>
internal List <NPC> GetNpcs(string season, int day)
{
Birthday birthday = GetBirthday(season, day);
if (birthday == null)
{
return(null);
}
else
{
return(birthday.GetNPCs());
}
}