A minimalist design featuring a simple, bold font reading "Happy Monday" on a bright yellow background, with a few strategically placed smiley faces and confetti dots to add a playful touch.

A whimsical depiction of a cartoon character, such as a smiling cat or dog, holding a "Happy Monday" sign and surrounded by a bouquet of colorful flowers, with a subtle background of a sunny day.

A bright and colorful illustration of a smiling sun rising over a cityscape on a Monday morning, with confetti and balloons floating in the air, surrounded by a bold and playful font reading "Happy Monday!"