With its candles and wishes, the birthday cake stands for the passing of time, being remembered and the hope carried into another year of life. Blowing out the candles is usually read as making a wish or marking a new start. A cake with no candles is linked to feeling forgotten, while a cake made for someone else points to affection for them. A cake falling apart stands for worry about ageing or expectations. It can help to notice how you feel about the passing years.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.