Hey, we don't make this stuff up, just like we don't have to make up National Fruitcake Toss Day (January 3), National Nothing Day (January 16), or National Dadgum That's Good Day (March 1). Others have already done this work for us.
And "pink" is probably a whole lot more relevant. The color is all around us, and its national day is meant for celebrating the things that pink represents.
According to the National Day Calendar, "Surveys were taken in both the United States and Europe with results indicating that the color pink combined with white or pale blue is most commonly associated with femininity, sensitivity, tenderness, childhood and the romantic." They suggest celebrating by wearing pink clothes, consuming pink food or drinks, or donating to charities that use pink.
They forgot pink light bulbs.
These days it's becoming more popular to light an outdoor colored porch (or garage) bulb in support of different themes. Green bulbs for veterans or St. Patrick's day for instance; orange bulbs for Halloween; blue light bulbs for honoring police; etc.
You can pick up pink light bulbs online from Lighting Supply. We carry them in a number of different bulb shapes (including the familiar A19 style) and ship them same business day to make sure you have them on time.