Let's make this birthday one to remember.

78 years old (Born on April 19, 1946)

Happy Birthday, John! May your day be as delightfully symmetrical and cleverly reversible as one of your famous ambigrams. Your artistic brilliance continues to amaze us—whether it's the captivating posters that make heads turn or the ingenious wordplay that leaves readers flipping pages upside down.

Your timeless creativity shines brighter each year, proving once again you're a master at turning words into visual magic. Here's hoping this birthday brings you endless inspiration (and perhaps fewer puzzled looks from people trying to read your designs sideways). Cheers to another fantastic year filled with artful adventures and playful perspectives—forward, backward, and upside-down!