📅Calendar Tricks & Shortcuts – Learn to Find Day, Date & More in Seconds!
📅 Calendar Tricks & Shortcuts – Learn to Find Day, Date & More in Seconds!
📅 Calendar Tricks & Shortcuts – Learn to Find Day, Date & More in Seconds!
👨🏫 By Grandmaster Bikram Sutradhar
🌐 sirbikramsutradhar.com | 📞 9863002294
🏆 5× World Record Holder | Best Teacher Awardee 2023 | IIT JAM AIR 392
🌟 1. What is an Odd Day?
Odd days = Days more than complete weeks (7 days)
📌 Example: 365 days = 52 weeks + 1 day ⇒ 1 odd day
👉 Use this trick to calculate the day of any date by counting odd days.
🗓️ 2. Leap Year Rules
A year is a leap year if:
✅ Divisible by 4
❌ Not divisible by 100 unless also divisible by 400
Examples:
✔️ 2004, 2008, 2016 = Leap
❌ 1900 = Not Leap
✔️ 2000 = Leap
Leap year has 2 odd days, normal year has 1 odd day
🧠 3. Day Codes (0 to 6)
These are standard values for reference:
| Day | Code |
| Sunday | 0 |
| Monday | 1 |
| Tuesday | 2 |
| Wednesday | 3 |
| Thursday | 4 |
| Friday | 5 |
| Saturday | 6 |
📆 4. Month Codes (For Non-Leap Year)
| Month | Code |
| January | 0 |
| February | 3 |
| March | 3 |
| April | 6 |
| May | 1 |
| June | 4 |
| July | 6 |
| August | 2 |
| September | 5 |
| October | 0 |
| November | 3 |
| December | 5 |
✅ In Leap Year, January = 6, February = 2
📋 5. 100-Year Odd Day Reference Table
| Century | Odd Days |
| 1600 | 0 |
| 1700 | 5 |
| 1800 | 3 |
| 1900 | 1 |
| 2000 | 0 |
| 2100 | 5 |
✅ Add this to your total for fast century-based calculations
🧠 6. How to Calculate the Day of Any Given Date
👉 Step-by-step for date: 15 August 1947
1️⃣ Take last two digits of year: 47
2️⃣ Divide by 4: 47 ÷ 4 = 11 (ignore remainder)
3️⃣ Add: Year + (Year ÷ 4) = 47 + 11 = 58
4️⃣ Add month code (August = 2) → 58 + 2 = 60
5️⃣ Add date: 60 + 15 = 75
6️⃣ Add century code (1900 = 1): 75 + 1 = 76
7️⃣ Divide by 7: 76 ÷ 7 = Remainder 6
8️⃣ Day code 6 = Friday
🎯 So, 15 August 1947 was a Friday 🇮🇳
🧮 7. Trick to Find Repeating Calendars
✅ A calendar repeats when:
- The next year has same odd days
- After 6 years (generally), or 11 years if leap year involved
📌 Example: 2017 & 2023 have same calendars
📌 2020 (leap) → Repeats in 2048
📊 8. Short Memory Trick (TOM HAS WIFED)
➡ Use this to remember month codes
T – January (0)
O – February (3)
M – March (3)
H – April (6)
A – May (1)
S – June (4)
W – July (6)
I – August (2)
F – September (5)
E – October (0)
D – November (3)
D – December (5)
In leap year: Jan = 6, Feb = 2
🎯 9. Fast Practice Questions
Try finding the day of:
- 2 October 1869 (Gandhi Jayanti)
- 26 January 1950 (Republic Day)
- 5 September 2025 (Teachers’ Day)
- 1 January 2000
- Your own birthday!
📥 Want answers + 30 practice questions PDF? Comment “Calendar PDF” or WhatsApp 9863002294
📘 Summary Chart for Fast Revision
✔️ Year Code = (Last 2 digits + (Year ÷ 4))
✔️ Add: Date + Month Code + Century Code
✔️ Divide by 7 → Match with day code
✔️ Leap Year? Adjust Jan & Feb code
✔️ Use TOM HAS WIFED to remember month codes
📲 Like | Save | Share | Tag a friend who struggles with calendar questions!
💡 Want to learn Vedic Math + Calendar + Aptitude Live from
👨🏫 Grandmaster Bikram Sutradhar
📞 Call/Message: 9863002294
🌐 Visit: sirbikramsutradhar.com
#CalendarTricks #MathShortcuts #GeneralKnowledge #Aptitude #SSCExam #BankPO #RailwayExam #DayCalculation #VedicMath #SirBikramSutradhar #StudySmart
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Written By
Full Stack Developer and 5-Time World Record Holder, Grandmaster Bikram Sutradhar
bAstronautWay
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ICSE CLASS 10 ICSE CLASS 10 BIOLOGY BASTRONAUTWAY SirBikramSutradhar Bikram Sutradhar GrandMaster Bikram Sutradhar selina biology solutions ICSE Biology Selina Solution
📚 Class 9 Science – Complete Table of Contents (विषय-सूची)
CBSE | NCERT Curriculum | Bilingual (English + Hindi)
By Grandmaster Bikram Sutradhar | SirBikramSutradhar | BASTRONAUTWAY
🔬 PHYSICS (भौतिक विज्ञान)
| 🔢 | Chapter Title (English) | अध्याय का नाम (हिंदी) | Page No. |
| 1️⃣ | Motion | गति | |
| 2️⃣ | Force and Laws of Motion | बल तथा गति के नियम | |
| 3️⃣ | Gravitation | गुरुत्वाकर्षण | |
| 4️⃣ | Work and Energy | कार्य तथा ऊर्जा | |
| 5️⃣ | Sound | ध्वनि |
🧪 CHEMISTRY (रसायन विज्ञान)
| 🔢 | Chapter Title (English) | अध्याय का नाम (हिंदी) | Page No. |
| 1️⃣ | Matter in Our Surroundings | हमारे आस-पास के पदार्थ | |
| 2️⃣ | Is Matter Around Us Pure? | क्या हमारे आस-पास के पदार्थ शुद्ध हैं? | |
| 3️⃣ | Atoms and Molecules | परमाणु एवं अणु | |
| 4️⃣ | Structure of the Atom | परमाणु की संरचना |
🧬 BIOLOGY (जीव विज्ञान)
| 🔢 | Chapter Title (English) | अध्याय का नाम (हिंदी) | Page No. |
| 1️⃣ | The Fundamental Unit of Life | जीवन की मौलिक इकाई | |
| 2️⃣ | Tissues | ऊतक | |
| 3️⃣ | Improvement in Food Resources | धनों में सुधार |
📘 ADDITIONAL SECTIONS (अतिरिक्त अनुभाग)
| 📖 Section | Title (English + Hindi) |
| 🔹 | Glossary / पारिभाषिक शब्दावली |
| 🔹 | Answer Keys / उत्तरमाला |
| 🔹 | Summary / सारांश |
| 🔹 | Important Diagrams / महत्वपूर्ण चित्र |
| 🔹 | NCERT Exercises / एनसीईआरटी अभ्यास |
| 🔹 | Sample Papers & MCQs / मॉडल पेपर व वस्तुनिष्ठ प्रश्न |
✅ All content follows the official NCERT Class 9 Science textbook structure. Each chapter will include explanations, bilingual notes, definitions, diagrams, MCQs, FAQs, and practice exercises under the BASTRONAUTWAY learning system.
class 10 Maths ncert solution.
CBSE Class 10 Mathematics (2025) NCERT Syllabus:
CBSE Class 10 Mathematics NCERT Syllabus (2025) – Chapter-Wise List
CBSE Class 10 Mathematics NCERT Syllabus (2025) – Chapter-Wise List
chapter 4. Quadratic Equations
chapter 5. Arithmetic Progressions
chapter 6. Triangles
chapter 7. Coordinate Geometry
chapter 8. Introduction to Trigonometry
chapter 9. Some Applications of Trigonometry
chapter 11. Areas Related to Circles
chapter 12. Surface Areas and Volumes
CBSE Class 10 Science (2025) NCERT Syllabus:
CBSE Class 10 Science NCERT Syllabus (2025) – Chapter-Wise List
CBSE Class 10 Science NCERT Syllabus (2025) – Chapter-Wise List
Chapter 1 Chemical Reactions and Equations
Chapter 2 Acids, Bases and Salts
Chapter 3 Metals and Non-metals
Chapter 4 Carbon and its Compounds
Chapter 5 Life Processes
Chapter 6 Control and Coordination
Chapter 7 How do Organisms Reproduce?
Chapter 8 Heredity
Chapter 9 Light – Reflection and Refraction
Chapter 10 The Human Eye and the Colourful World
Chapter 11 Electricity
Chapter 12 Magnetic Effects of Electric Current
Chapter 13 Our Environment
📖 Chapter 12 – Organic Chemistry (Selina Textbook)
Table of Contents:
- 12A. Organic Compounds
- 12B. Hydrocarbons: Alkanes
- 12C. Hydrocarbons: Alkenes
- 12D. Hydrocarbons: Alkynes
- 12E. Alcohols
- 12F. Carboxylic Acids
- Exercise 12 MISCELLANEOUS
- Glossary
- Model Question Paper –
📌 Exercise 12 MISCELLANEOUS – Focus Areas:
- 🧬 Consolidated practice from the entire Organic Chemistry chapter
- 🧪 Application-based questions covering alkanes, alkenes, alkynes, alcohols, and carboxylic acids
- 🧾 Writing structural formulas and chemical equations
- 💡 Distinguishing reactions, isomer identification, and conversions
- 📘 Full-syllabus revision to boost conceptual clarity and board exam readiness
Each question in this section is designed to:
- ✅ Strengthen cross-topic understanding
- 📝 Prepare students for application-based and reasoning-based questions
- 🧠 Improve problem-solving speed and exam performance
class 5
📚 Class 9 Science – Complete Table of Contents (विषय-सूची)
CBSE | NCERT Curriculum | Bilingual (English + Hindi)
By Grandmaster Bikram Sutradhar | SirBikramSutradhar | BASTRONAUTWAY
🔬 PHYSICS (भौतिक विज्ञान)
| 🔢 | Chapter Title (English) | अध्याय का नाम (हिंदी) | Page No. |
| 1️⃣ | Motion | गति | |
| 2️⃣ | Force and Laws of Motion | बल तथा गति के नियम | |
| 3️⃣ | Gravitation | गुरुत्वाकर्षण | |
| 4️⃣ | Work and Energy | कार्य तथा ऊर्जा | |
| 5️⃣ | Sound | ध्वनि |
🧪 CHEMISTRY (रसायन विज्ञान)
| 🔢 | Chapter Title (English) | अध्याय का नाम (हिंदी) | Page No. |
| 1️⃣ | Matter in Our Surroundings | हमारे आस-पास के पदार्थ | |
| 2️⃣ | Is Matter Around Us Pure? | क्या हमारे आस-पास के पदार्थ शुद्ध हैं? | |
| 3️⃣ | Atoms and Molecules | परमाणु एवं अणु | |
| 4️⃣ | Structure of the Atom | परमाणु की संरचना |
