The Ones Who See

On the Nintendo Today app, one of the selectable themes is the Donkey Kong theme. The theme has an Easter egg whereby on the 30th of each month, the animation actually differs based on whether that is the last day of that month, or whether that month also has a 31st day.

Both animations start off identically, with King K. Rool playing dead on the ground, with the text "The Month is Over?" However...

Left: on a month that does not end on the 30th, King K. Rool wakes up suddenly as the text disappears, signifying that there is still one more day left.

Right: if the month does end on the 30th, the text fades into "The Month is Over" without a question mark as King K. Rool remains dead.

*Ahem* he looks good in black..