Why 21st June is bigger than other days? tell me in english

Short answer In the Northern Hemisphere, June 21 is usually the longest day of the year—the longest daylight period—because of the summer solstice. On the Southern Hemisphere, it is the shortest day of the year.

Step-by-step explanation

1. What “bigger” means here

• If we interpret “21st June is bigger than other days” as “the daylight duration is longer,” then June 21 is typically the day with the most daylight in the Northern Hemisphere.

2. The key ideas

• Earth’s axis tilts about 23.5 degrees relative to its orbit around the Sun.
• Because of this tilt, different hemispheres get different amounts of sunlight as the year goes by.
• The Sun’s path across the sky is highest in the Northern Hemisphere around summer, and lowest around winter.

3. The summer solstice

• Around June 21, the Northern Hemisphere is tilted closest toward the Sun.
• The Sun reaches its highest position in the sky at solar noon.
• Sunrise becomes earlier and sunset becomes later, so the daylight period is the longest of the year.
• This is called the summer solstice.

4. How long is that daylight?

• The exact length depends on your latitude.
• At mid-latitudes (e.g., many parts of Europe, North America), daylight on June 21 is roughly 15–17 hours.
• Further north, days get even longer (e.g., about 18 hours in parts of Scandinavia).
• Very far north (above the Arctic Circle), there can be 24 hours of daylight around the solstice (the midnight sun).

5. Why it’s not the same everywhere

• The date can shift by a day or two each year due to the slight irregularities in Earth’s orbit and the leap-year calendar.
• The idea of “longest day” is specific to the Northern Hemisphere; in the Southern Hemisphere, June 21 is near the winter solstice and is one of the shortest days.

6. Quick takeaway

• June 21 is “bigger” (i.e., longer daylight) than other days for much of the Northern Hemisphere because it’s the summer solstice when the Sun takes its highest path and the day is longest.
• The opposite happens in the Southern Hemisphere: it’s around the winter solstice and daylight is shortest there.

If you’d like, I can tailor this explanation to a specific grade level or give a simple diagram description to help visualize the tilt and the solstice.