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National Calendar of India, adopted in 1957, is based on the Saka era (78 AD). It has 12 solar months starting with Chaitra and is used with the Gregorian calendar for official purposes
Many UPSC aspirants struggle with calendar-related topics, especially when it comes to understanding different systems and conversions. The National Calendar of India solves this confusion by offering a standard and scientific system used in official work.
It is not just a static GK topic—it is directly linked to questions on Indian calendar system, date conversion, and comparisons like Saka calendar vs Gregorian calendar.
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The National Calendar of India, also known as the Indian civil calendar, is the official calendar used by the Government of India. It was introduced to bring uniformity to the diverse Indian calendar system. Key highlights include:
This standardisation removed confusion caused by multiple regional calendars.
The Indian national calendar history began after independence when India needed a unified calendar for administration. To address this issue:
This reform marked a major step towards a scientific and uniform time system in India.
The national calendar of India months are based on solar calculations, ensuring accuracy and consistency. Here’s how the structure works:
This structure makes the calendar easy to align with the Gregorian system.
Understanding the national calendar of India months is important for exams. The table below shows their duration and corresponding Gregorian months:
| Months in National Calendar of India | ||
| Saka Month | Days | Gregorian Equivalent |
| Chaitra | 30/31 | March–April |
| Vaishakha | 31 | April–May |
| Jyeshtha | 31 | May–June |
| Ashadha | 31 | June–July |
| Shravana | 31 | July–August |
| Bhadra | 31 | August–September |
| Ashwin | 30 | September–October |
| Kartika | 30 | October–November |
| Agrahayana | 30 | November–December |
| Pausha | 30 | December–January |
| Magha | 30 | January–February |
| Phalguna | 30 | February–March |
The comparison of Saka calendar vs Gregorian calendar is a frequent exam topic. Both are solar calendars but differ in origin and usage.
Key differences:
Despite differences, both follow solar calculations.
The National Calendar of India plays a vital role in governance and official communication.
It is used in:
Overall, it ensures uniformity and accuracy across the Indian government calendar system.
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India follows a diverse Indian calendar system, combining tradition with modern governance.
Important points:
Understanding Saka calendar dates conversion is essential for solving exam questions.
Basic formula:
This helps in:
India uses both the Indian national calendar and the Gregorian calendar for practical reasons. The system works because:
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It is the official civil calendar based on the Saka era used for government purposes.
It was adopted in 1957 after the Calendar Reform Committee’s recommendations.
Chaitra is the first month starting in March.
They differ in origin, starting month, and usage, though both are solar calendars.
Subtract 78 from the Gregorian year to get the Saka year and add 78 to convert back.
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