[For Seniors] Trivia Quiz & Fun Facts for June
June in Japan is the rainy season, so we often have a string of gloomy, unsettled days.
At the same time, though, it’s also when plums are harvested and hydrangeas are in full bloom, and we observe occasions like Father’s Day and the Nagoshi no Harae purification—seasonal plants and events unique to this time of year.
In this article, we’ll present trivia and fun facts related to June in a quiz format.
See how many you can get right, and enjoy taking on the challenge together!
If you come across any facts you didn’t know, take this opportunity to remember them and share them with your family and friends!
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[For Seniors] June-Themed Trivia Quiz & Fun Facts Collection (21–30)
Which tea is made from hydrangeas?
- Hojicha
- sweet tea
- bancha (coarse everyday green tea)
See the answer
sweet tea
Tea made from hydrangeas is called amacha. Amacha is made from a plant in the genus Amacha of the hydrangea family, a type of hydrangea. It is characterized by its distinctive sweetness and is offered on the Buddha’s birthday.
What kind of day is the summer solstice?
- The day with the longest hours of sunlight
- A day when the lengths of day and night are almost equal
- the day with the shortest daylight hours
See the answer
The day with the longest hours of sunlight
The summer solstice refers to the day in the Northern Hemisphere when the sun reaches its highest elevation and the daylight hours are the longest of the year. This occurs because the tilt of Earth’s axis causes the area directly illuminated by the sun to extend furthest into the Northern Hemisphere. After the summer solstice, daylight gradually shortens as it approaches the winter solstice.
Which country is considered the birthplace of Father’s Day?

Father’s Day originated in the United States.
In 1909, Sonora Smart Dodd petitioned a ministers’ association for “a day to honor fathers,” which marked the beginning.
However, at the time, Father’s Day was less well-known than Mother’s Day.
It is said to have spread after President Woodrow Wilson delivered a speech at a ceremony in 1916.
In Japan, it wasn’t until the 1980s that it became widely recognized as it is today.
Although Father’s Day now seems commonplace, the sentiments of those who came before us toward fathers have borne fruit, and it is known as an important day both at home and abroad.
Generally, on what date in June is the seasonal wardrobe change carried out?
- June 1
- June 15
- June 30
See the answer
June 1
In Japan, people generally switch to summer clothing on June 1. From this day, they change into lighter summer attire to prepare for staying comfortable during the hot season.
What causes the color of hydrangeas to change?
- Amount of water
- Soil pH
- sunshine duration
See the answer
Soil pH
The color of hydrangea flowers changes depending on the soil’s pH level. In acidic soil, they bloom blue, while in alkaline soil, they bloom red or pink. This is because the amount of aluminum the hydrangea absorbs varies with the soil pH.
What kind of day does the summer solstice refer to?
The summer solstice, one of the 24 solar terms.
It’s the phrase you’ll notice when you turn the calendar during this season.
You’ve probably seen or heard it before, but do you know exactly what day the “summer solstice” refers to? The answer is… the day with the longest daylight hours.
On this day, when the sun climbs high in the sky and the bright hours stretch on, we mark a major turning point in the seasons.
Knowing this makes the feeling of summer more tangible.
As you enjoy the long daylight, take a moment to sense the shifting of the seasons.
What date in June is Okinawa Memorial Day?

Okinawa Prefecture was the only place in Japan to become a battlefield during the Pacific War, resulting in the loss of many civilians’ lives, cultural heritage, and natural environment.
June 23 marks the day when the ground battle that engulfed the prefecture’s residents at the end of the Pacific War came to an end.
In 1965, the Ryukyu Government designated this day to honor the souls of those who perished in the war and to express a wish for world peace.
Every year, on Okinawa Memorial Day, workplaces and schools are said to be closed.
At noon, sirens sound and people observe a one-minute moment of silence, making this a significant day for the people of Okinawa.



