This design shows three cartoon cats lined up side by side on an apple-green background, their wide amber eyes and soft smiles giving them a friendly, affectionate look 💚. A sleek black cat sits first, followed by a white cat with olive-green and charcoal spots, and then an orange tabby, all drawn with simple outlines and tiny blush marks that make them seem warmly connected. Above their heads, “HAPPY” appears in mixed dark green and white letters, spaced across the top like a header. Shamrocks float around them in white, deep forest green, and light chartreuse ☘️, filling the space without crowding the cats. Beneath the trio, “ST. CATTY’S DAY” is set in bright white, centered and easy to read against the green. At the very bottom, “– SON –” appears in smaller white text, neatly aligned under the main phrase. The cats’ whiskers are individually drawn, and the background is dotted with shamrocks in alternating sizes and shades of green and white.