A minimalist design featuring a simple, hand-drawn birthday cake with a single candle lit, surrounded by a subtle background of stars and a few confetti pieces, with the words 'Happy Belated Birthday' written in elegant, cursive script.

A whimsical illustration of a cartoon character, such as a cartoon animal or superhero, holding a big sign that says 'Happy Belated Birthday' in curly, swirly letters, with a big smile and a party hat on their head.

A colorful illustration of a birthday cake with candles lit, surrounded by balloons and confetti, with a big banner that reads 'Happy Belated Birthday' in bold, playful font, and a few gifts and presents scattered around the table.