Why 21st December Is the Shortest Day? | Winter Solstice 2025 Explained for UPSC & NDA

Описание: The Winter Solstice 2025, observed on 21 December, marks a crucial astronomical turning point of the year. It is the shortest day and longest night in the Northern Hemisphere, caused by the 23.5° axial tilt of the Earth, which results in minimal sunlight reaching northern regions while the Southern Hemisphere experiences its longest day.
In this detailed explainer, Itihas Se Kal Tak – by Divya breaks down the science, history, culture, and exam relevance of the Winter Solstice in a clear and structured manner, making it highly useful for UPSC, CDS, NDA, State PCS, and General Awareness preparation.

👉 हमारी Playlist देखें:
📂 इतिहास से सीखें (History & Mythology):    • इतिहास से सीखें (History & Mythology)  
📂 विज्ञान की दुनिया: GK और रहस्य :    • विज्ञान की दुनिया: GK और रहस्य  
📂 Current Affairs 2025: History & Events:    • Current Affairs 2025: History & Events  

🔍 What you will learn in this video:

✅ What is the Winter Solstice and why it occurs
✅ Scientific explanation of the Earth’s axial tilt and revolution
✅ Why December 21 is the shortest day in the Northern Hemisphere
✅ Difference between Solstice and Equinox
✅ Cultural and historical importance of the Winter Solstice
✅ How ancient civilizations tracked the Sun’s movement
✅ Significance of monuments like Stone henge, designed to align with solstice sunlight
✅ Winter Solstice and astronomy-based festivals
✅ Best stargazing opportunities, including winter constellations and the Ursid meteor shower
✅ Why the solstice is considered a solar turning point, with daylight increasing after this date

🧠 Exam Relevance (VERY IMPORTANT):

This topic is frequently asked in:

1. UPSC Prelims (Astronomy + Geography + Current Affairs)
2. CDS & NDA (General Science / Geography)
State PCS & SSC
3. School-level competitive exams

Questions may appear in forms such as:

1. “Consider the following statements…”
2. Assertion–Reason
3. Match the following
4. One-word factual questions

This video helps you build conceptual clarity, not just factual memory.

🌌 Why Winter Solstice matters beyond science:

The Winter Solstice has been observed for thousands of years as a symbol of renewal, transition, and hope, marking the gradual return of longer days. Ancient societies used it to regulate agriculture, rituals, and calendars, making it a powerful intersection of science and history.

📚 Channel Philosophy – @ISK_Divya This channel bridges History, Science, and Current Affairs, helping aspirants understand why events happen—not just what happens.

📌 If you found this video useful: 👍 Like the video

📝 Comment your doubts or exam questions

🔔 Subscribe for daily exam-oriented content

#winterSolstice2025 #ShortestDayOfTheYear #AstronomyForExams
#UPSC #CDS #NDA #CurrentAffairs #GeneralScience
#Geography #AncientHistory #ItihasSeKalTak #ISK_Divya