Should you put only one candle on the first birthday cake?

It is common to put only one candle on a first birthday cake as a tradition. This candle symbolizes the child's first year of life and is often used to represent their growth, development, and the beginning of their journey. The single candle also serves as a focal point for the child and the attendees to make a wish and sing the "Happy Birthday" song. So it is typically advised to use a single candle on a first birthday cake.