National Find a Rainbow Day is on Saturday, April 3, 2027, and it falls on April 3 every year. It’s a reason to look up after a spring shower and spot a rainbow. You can also make your own with a garden hose or a glass of water.
When Is National Find a Rainbow Day?
It’s always April 3. That timing suits early spring, when quick showers and breaks of sunshine often come on the same afternoon.
Who Started National Find a Rainbow Day?
No founder or start year has been documented.
What Is the Purpose of Find a Rainbow Day?
It’s a nudge to notice something beautiful that only lasts a few minutes. It’s also a simple science lesson: once you know how rainbows work, you know exactly where to look.
How do rainbows form?
Sunlight bends as it enters a water droplet, reflects off the back of the drop and bends again on the way out. NOAA’s SciJinks explains that violet light bends the most and red the least, which spreads the colors into a band.
Where should you look?
Keep the sun behind you and look toward the rain. The National Weather Service says that if the sun is more than 42 degrees above the horizon, no rainbow will be visible. That’s why rainbows show up in the morning or late afternoon, not at midday.
The lower the sun, the bigger the arc. At sunset, you can see a full half-circle.
How to Celebrate National Find a Rainbow Day
- Time your search: after a shower, head outside in the early morning or late afternoon with the sun at your back.
- Make one with a hose: stand with the sun behind you and spray a fine mist in front of you.
- Use a glass of water: set it on a sunny windowsill and look for a small rainbow on the floor or wall.
- Try a CD or prism: tilt it in sunlight to split light into colors.
- Snap a photo: use a landscape lens or panorama mode to fit the whole arc.
- Make rainbow art: kids can paint the colors in order, red on the outside, violet inside.
Frequently Asked Questions
What causes a double rainbow?
Light reflecting twice inside the raindrops. The second bow is fainter, and its colors are reversed, with red on the inside instead of the outside.
Are rainbows really circles?
Yes. From the ground, the land cuts off the bottom half. From an airplane, in the right conditions, you can see a full circular rainbow.
Can two people see the same rainbow?
Not exactly. A rainbow’s position depends on where you stand relative to the sun and drops, so each viewer sees light from slightly different droplets.