Read the following text and answer the question.

Today, Fauzi is visiting his grandparents. He loves cooking with his grandmother. His grandma usually teaches him how to cook delicious dishes. At this moment, he is learning how to make roasted chicken.

Fauzi is helping to cut some onions, carrots, potatoes and vegetables. He is also writing his grandmother's recipe. He plans to make roasted chicken at home next Saturday. He is making the roasted chicken for his mother. Next Saturday is his mother’s birthday.

Two hours later, Fauzi and his grandparents have finished eating roasted chicken. Now, they are listening to grandfather’s story. His grandpa has many stories about life, joke, culture and many more. They’re enjoying their time together.

Who is having a birthday next Saturday?