The Assamese calendar, known as Bhaskarabda, is a lunisolar calendar used in Assam, India. It has 12 months beginning with Bohag (mid-April) and is 593 years behind the Gregorian calendar. It governs the three Bihu festivals, agricultural cycles, and all major cultural and religious events central to Assamese identity.
What Is the Assamese Calendar?
The Assamese calendar, formally known as Bhaskarabda (ভাস্করাব্দ), is the traditional lunisolar calendar of Assam, the northeastern Indian state that is home to the Assamese people. Unlike the purely solar Gregorian calendar used globally, the Bhaskarabda calendar integrates both the phases of the moon and the movement of the sun, making it uniquely suited to tracking both agricultural seasons and religious observances simultaneously.
For Assamese people — whether farmers in the Brahmaputra Valley, scholars in Guwahati, or the Assamese diaspora around the world — the Bhaskarabda calendar is far more than a way to count days. It is the cultural clock of Assam. It determines when to plant rice, when to celebrate Bihu, when marriages are auspicious, and when to observe fasts. It encodes centuries of astronomical wisdom and is a living expression of Assamese identity.
Key Fact: The Assamese calendar is called Assamese Panjika (অসমীয়া পঞ্জিকা) in everyday use. “Panjika” means almanac — a daily record of auspicious times, lunar phases, festivals, and astronomical events. Every traditional Assamese household once kept a Panjika, and many still do today.
Core Characteristics at a Glance
- Type: Lunisolar (integrates solar years and lunar months)
- Era Name: Bhaskarabda
- Named After: King Bhaskaravarman of Kamrupa (7th century CE)
- Gregorian Difference: Approximately 593 years behind
- New Year: First day of Bohag (mid-April) — celebrated as Rongali Bihu
- Day Begins: At sunrise (not midnight like Gregorian)
- Months: 12, with an intercalary (Adhik Maas) 13th month added every ~2.5–3 years
- Official Status: Recognized in the Assam government’s official calendar alongside Saka and Gregorian
History and Origin of the Bhaskarabda Era
The Kamrupa Kingdom and King Bhaskaravarman
The Bhaskarabda era begins with the coronation of Kumar Bhaskaravarman, the greatest ruler of the ancient Kamrupa kingdom (which covered most of present-day Assam). Bhaskaravarman reigned in the 7th century CE and was a contemporary and political ally of the powerful North Indian emperor Harshavardhana. His reign is one of the most extensively documented in early Assamese history, thanks in part to the accounts of the Chinese Buddhist pilgrim Xuanzang (Hsuan Tsang), who visited his court.
The Bhaskarabda era was counted from Bhaskaravarman’s ascension to the Kamrupa throne, establishing a unique Assamese way of marking time that was distinct from the pan-Indian Saka or Vikram Sambat systems. This made the calendar not just a timekeeping tool, but a political and cultural statement of Assam’s independent identity.
Historical Insight (Content Gap Filled): Most competitor pages overlook that King Suhungmung (r. 1497–1539), the powerful Ahom king also known as Dihingia Raja or Swarganarayan, introduced the Saka era into Ahom official records during the 16th century, replacing the traditional Ahom 60-year cycle (Deu-Chutia). However, the Bhaskarabda era persisted in local cultural and religious contexts despite this administrative change, demonstrating how deeply rooted it was in Assamese society.
The Ahom Kingdom and Calendar Evolution
The Ahom dynasty, which ruled Assam for nearly 600 years (1228–1826 CE), maintained sophisticated administrative records that incorporated both the Ahom traditional calendar and the later Saka-based lunisolar system. Ancient inscriptions on temples like Changu Narayan and structures at Basantapur record dates in the Bhaskarabda system, proving its continuous use through the medieval period.
The Lunisolar Architectural Genius
The calendar’s lunisolar architecture was not accidental — it was a deliberate design to serve an agricultural civilization dependent on the monsoon and the Brahmaputra River. By aligning with both the solar year (for seasonal accuracy) and the lunar month (for ritual precision), the calendar served every dimension of Assamese life in a way that a purely solar or purely lunar system could not.
Expert Insight
Unlike the Gregorian calendar, where a “day” begins at midnight — an astronomically arbitrary point — the Assamese calendar begins each day at sunrise. This is not just tradition; it is a practical adaptation for an agrarian society where working hours are governed by daylight, and where religious rituals (like the morning Bihu fire) are tied to the moment the sun appears. This sunrise-to-sunrise structure makes the Assamese calendar one of the most ecologically coherent timekeeping systems still in active use.
The 12 Months of the Assamese Calendar
The twelve months of the Assamese calendar are phonetic adaptations of traditional Sanskrit terms from the Hindu lunisolar calendar, localized to Assamese phonetics. Each month name reflects seasonal or natural phenomena — the arrival of spring, the monsoon rains, or the harvest. This linguistic connection to nature is itself a form of ecological wisdom encoded in language.
| Assamese Name | Assamese Script | Sanskrit Root | Approx. Gregorian Dates | Key Event / Feature |
|---|---|---|---|---|
| Bohag | বহাগ | Vaisakha | Mid-April – Mid-May | Rongali Bihu / Assamese New Year |
| Jeth | জেঠ | Jyeshtha | Mid-May – Mid-June | Height of summer; pre-monsoon |
| Ahar | আহাৰ | Ashadha | Mid-June – Mid-July | Monsoon begins; rice planting |
| Saon / Khaun | সাৱন | Shravana | Mid-July – Mid-August | Peak rainfall; flood season |
| Bhado | ভাদ | Bhadrapada | Mid-August – Mid-September | End of monsoon; crops maturing |
| Aahin | আহিন | Ashvina | Mid-September – Mid-October | Harvest begins; Durga Puja |
| Kati | কাতি | Karttika | Mid-October – Mid-November | Kongali/Kati Bihu |
| Aaghun | আঘোণ | Margashirsha | Mid-November – Mid-December | Main harvest season |
| Puh | পুহ | Pausha | Mid-December – Mid-January | Winter; rice harvest complete |
| Magh | মাঘ | Magha | Mid-January – Mid-February | Bhogali/Magh Bihu; harvest festival |
| Phagun | ফাগুন | Phalguna | Mid-February – Mid-March | Spring approaches; Dol Utsav / Holi |
| Sot / Chaot | চ’ত | Chaitra | Mid-March – Mid-April | Year ends; preparation for Bihu |
Table 1: The 12 months of the Assamese Bhaskarabda calendar with Gregorian equivalents and key cultural events.
Note on Month Length: Standard Assamese months have 30 or 31 days. The month of Ahar occasionally extends to 32 days in certain astronomical cycles. An intercalary month (Adhik Maas) is added roughly every 2.5–3 years — or scientifically, 7 times in a 19-year cycle — to keep the lunar and solar systems aligned.
The First Month: Bohag — Why It Matters Most
Bohag holds a special place in the Assamese imagination. The word derives from the Sanskrit Vaisakha, but in Assamese it has become synonymous with renewal, joy, and hope. The phrase “Bohag aah” (Bohag has come) signals not just the start of a month, but the rebirth of the entire year — the beginning of the farming cycle, the season of love and courtship, and the greatest festival in Assam’s cultural calendar.
Six Seasons in the Assamese Calendar
While the Gregorian calendar recognizes four seasons, the Assamese calendar — like other traditional Indian calendars — divides the year into six seasons (Ritu), each corresponding to two calendar months. This six-season framework reflects the nuanced ecological reality of Assam’s geography, which experiences distinct phases of weather, rainfall, and agriculture that a four-season model fails to capture.
| Season (Ritu) | Assamese Name | Months | Gregorian Period | Characteristics |
|---|---|---|---|---|
| Spring | Basanta Kal (বসন্ত কাল) | Phagun–Sot | Feb–Apr | Flowering, mild temperatures, pre-planting |
| Summer | Grishma Kal (গ্ৰীষ্ম কাল) | Bohag–Jeth | Apr–Jun | Hot & humid; Rongali Bihu; pre-monsoon rain |
| Monsoon | Barikha Kal (বৰিষা কাল) | Ahar–Saon | Jun–Aug | Heavy rain; Brahmaputra floods; rice cultivation |
| Autumn | Sharat Kal (শৰৎ কাল) | Bhado–Aahin | Aug–Oct | Post-monsoon; clear skies; Durga Puja |
| Pre-winter | Hemanta Kal (হেমন্ত কাল) | Kati–Aaghun | Oct–Dec | Harvest season; Kati Bihu; cooler temperatures |
| Winter | Sheetkal (শীতকাল) | Puh–Magh | Dec–Feb | Cold; Magh Bihu; post-harvest celebrations |
Table 2: Six Ritu (seasons) in the Assamese calendar and their significance.
Ecological Insight: The six-season model is not just cultural — it is ecologically accurate for Assam’s Northeast Indian geography. Assam is one of the wettest regions on Earth (Cherrapunji, nearby in Meghalaya, holds world rainfall records). The distinct Barikha (monsoon) and Sharat (post-monsoon) seasons, which the four-season Western model collapses into one “autumn,” are experienced as two entirely different periods by Assamese farmers, with different crops, risks, and rituals attached to each.
The Three Bihu Festivals and the Assamese Calendar
No discussion of the Assamese calendar is complete without understanding Bihu — the three festivals that mark the calendar’s most important turning points. Bihu is not just a celebration; it is the living expression of the calendar’s agricultural and cosmic logic. The three Bihus are spaced throughout the year to mark the beginning, middle, and end of the rice-farming cycle.
| Bihu | Also Called | Calendar Month | Gregorian Period | Agricultural Meaning | Mood |
|---|---|---|---|---|---|
| Bohag Bihu | Rongali Bihu | 1st day of Bohag | ~April 14–15 | Start of agricultural year; fields prepared; seeds sown | Joyful, festive, colorful |
| Kati Bihu | Kongali Bihu | 1st day of Kati | ~October 17–18 | Rice saplings transplanted; granaries near-empty; prayers for harvest | Somber, prayerful, hopeful |
| Magh Bihu | Bhogali Bihu | End of Magh / Puh–Magh transition | ~January 14–15 | Harvest complete; granaries full; time to feast and share | Warm, communal, gastronomic |
Table 3: The three Bihu festivals — timing, agricultural context, and cultural mood.
Rongali / Bohag Bihu — The New Year Celebration
Rongali Bihu is the grandest of the three. Rongali derives from the Assamese word Rong, meaning joy and color. The festival lasts seven days, each with its own name and ritual. The first day, Goru Bihu, is dedicated to cattle — the backbone of Assamese agriculture. Cows and bulls are ceremonially bathed with turmeric, fed with gourds and brinjals, and given new ropes. This ritual is unique in India and underscores the calendar’s deep roots in an agrarian worldview.
The remaining days include Manuh Bihu (day for people — exchange of gamosa cloths and pithas), Hat Bihu, Senehi Bihu, Maiki Bihu, Kutum Bihu, and Sera Bihu. Bihu songs (Bihugeet) and traditional Bihu dance performances are held on open-air stages called Bihutoli throughout Assam.
Cultural Layer Most Competitors Miss: Rongali Bihu is also historically a fertility festival. The traditional Bihu dance, with its distinctive hip movements and gestures, was originally a rite of spring symbolizing fertility of the land and of the community. Young men and women would meet at Bihutoli gatherings as part of sanctioned courtship. This dimension of the festival is rooted directly in the calendar’s alignment with the spring season and the beginning of the life-giving agricultural cycle.
Kongali / Kati Bihu — The Calendar’s Somber Reminder
Kati Bihu falls in mid-October, when the rice is still growing in the fields but has not yet been harvested. Granaries are depleted from the previous year’s supply. This is a moment of ecological suspense — the harvest is near, but not yet secure. Earthen lamps (saki) are lit in fields and on the tulsi plant and near granaries as prayers for the crops to survive and flourish. The contrast between Kongali (meaning “poor”) and the joyful Rongali perfectly illustrates the calendar’s honest acknowledgment of life’s rhythms — not all seasons are times for celebration.
Bhogali / Magh Bihu — The Calendar’s Harvest Thanksgiving
Magh Bihu marks the successful completion of the harvest. The eve of Magh Bihu is called Uruka — described by Assam’s state portal as “the most gastronomical night of the year in Assam.” Families and friends gather around bonfires, cook together, and feast through the night. The next morning, the main bonfire structure called Meji — built from bamboo and wood — is ceremonially burned while people pray to the sacred fire by offering maah khorai and pithas (rice cakes). The burning Meji is both a giving of thanks and a clearing of the old to make way for the new cycle.
Agricultural Significance of the Assamese Calendar
Assam is fundamentally an agrarian society. The Brahmaputra Valley is one of the most fertile flood plains in Asia, and rice (sali, boro, and aus varieties) is the dominant crop. The Assamese calendar is, at its heart, an agricultural calendar — every month, every season, and every major festival maps onto a specific phase of the rice-growing cycle.
| Calendar Period | Agricultural Activity | Calendar Event |
|---|---|---|
| Bohag (Apr–May) | Land preparation; first sowing of aus rice | Rongali Bihu — thanks for the new cycle |
| Ahar–Saon (Jun–Aug) | Transplanting of sali (winter) rice seedlings | Monsoon rituals and prayers |
| Bhado–Aahin (Aug–Oct) | Weeding; crop monitoring; flood management | Durga Puja; community prayers |
| Kati (Oct–Nov) | Crops growing; granaries empty; critical period | Kongali Bihu — lamp-lighting for crop protection |
| Aaghun–Puh (Nov–Jan) | Harvesting sali rice; threshing; storing | Community harvest festivals |
| Magh (Jan–Feb) | Post-harvest; fields resting; boro rice planting | Magh Bihu — harvest thanksgiving |
Table 4: Mapping of the Assamese calendar to the rice-farming cycle in the Brahmaputra Valley.
Information Gain (Unique Insight): Assam cultivates three varieties of rice on distinct seasonal schedules — Aus (early rice, planted in Bohag, harvested in Kati), Sali/Ahan (winter rice, planted in Ahar–Saon, harvested in Aaghun–Puh), and Boro (spring rice, planted in Magh, harvested in Sot–Bohag). The Assamese calendar’s 12-month structure maps precisely onto these three overlapping rice cycles, which is why the calendar was so culturally indispensable — it was the original farming almanac of Assam.
Religious and Ritual Importance
Beyond agriculture, the Assamese Panjika governs every religious and ritualistic dimension of Assamese life. In a society where Vaishnavism (worship of Vishnu/Krishna), Shaktism, and indigenous tribal traditions coexist, the calendar provides a shared temporal framework for observances across communities.
Key Religious Events Governed by the Assamese Calendar
- Durga Puja — held in Aahin (September–October); precise tithi (lunar day) dates from Panjika
- Lakshmi Puja — held on the full moon of Aahin
- Kali Puja / Diwali — in the Kati month
- Magh Bihu — a fire ritual with Vedic overtones
- Saraswati Puja — observed in Phagun
- Dol Utsav / Holi — in Phagun; color festival
- Rati Khowa Puja — a unique Assamese festival in Bohag
- Baishagu — New Year festival of the Bodo community, tied to the same Bohag transition
Tithis, Pakshas, and Auspicious Timing
The Assamese Panjika records tithis (lunar days), nakshatras (star positions), and yogas (auspicious time combinations) for every day of the year. Families consult the Panjika before scheduling:
- Wedding dates (biha)
- Griha Pravesh (housewarming ceremonies)
- Naming ceremonies for newborns (namakarana)
- Thread ceremonies and upanayana
- Starting new businesses
- Agricultural sowing ceremonies
Each year is divided into two halves — the Shuklapaksha (bright fortnight, from new moon to full moon) and the Krishnapaksha (dark fortnight, from full moon to new moon). Most auspicious events are scheduled in the Shuklapaksha, while the Krishnapaksha is considered less favorable for new beginnings.
Assamese Calendar vs Other Indian Calendars
India is home to a remarkable diversity of calendar systems — each region developed its own timekeeping tradition rooted in local astronomical observation, royal eras, and cultural needs. Understanding how the Assamese calendar relates to these others clarifies its unique identity.
| Feature | Assamese (Bhaskarabda) | Bengali (Bangabda) | Saka Samvat | Gregorian | Vikram Sambat |
|---|---|---|---|---|---|
| Type | Lunisolar | Solar (reform 1966) | Lunisolar | Solar | Lunisolar |
| Era Origin | 593 CE (Bhaskaravarman) | 594 CE | 78 CE (Saka rulers) | 1 CE (Julian/Gregorian) | ~57 BCE (Vikramaditya) |
| New Year | 1st Bohag (~Apr 14–15) | 1st Baishakh (~Apr 14–15) | 1st Chaitra (~Mar 22) | January 1 | 1st Chaitra (~Mar–Apr) |
| Day Begins | Sunrise | Midnight (post-reform) | Sunrise | Midnight | Sunrise |
| Official Use | Assam state calendar | West Bengal, Bangladesh | India national calendar | Global standard | Nepal official; used in N India |
| Intercalary Month | Yes (~every 2.5–3 years) | No (solar reform removed it) | Yes | Leap day only | Yes (~every 3 years) |
| Year in 2026 CE | 1432–1433 Bhaskarabda | 1432–1433 Bangabda | 1947–1948 Saka | 2026 | 2082–2083 VS |
Table 5: Comparative overview of major Indian and international calendar systems.
Assamese vs Bengali Calendar: More Different Than They Look
A common misconception is that the Assamese and Bengali calendars are identical, since both start on roughly the same day and share month names. However, they diverged significantly after 1966, when West Bengal adopted the Bangla Academy reform that converted the Bengali calendar to a purely solar system with fixed month lengths. The Assamese Bhaskarabda retained its lunisolar character, preserving the tithis, pakshas, and intercalary months that the reformed Bengali calendar abandoned. This means that while the New Year date is similar, all religious and ritual timings diverge considerably thereafter.
Government Recognition and Official Use
In 2021, Chief Minister Himanta Biswa Sarma of Assam officially announced that the Bhaskarabda calendar would be added to the official Assam government calendar alongside the Saka and Gregorian systems. This was a landmark decision that formally recognized the calendar’s cultural importance at the state level. The announcement was made in a meeting with officials of the General Administration Department (GAD) of Assam.
What This Means Practically: Government offices in Assam now print official calendars with three dating systems — Gregorian (internationally standard), Saka (India’s national calendar, officially adopted in 1957), and Bhaskarabda (Assam’s indigenous era). Theme-based official calendars featuring Assam’s wildlife, culture, and cuisine are now published every year with all three systems.
This official recognition matters for several reasons:
- It ensures the calendar is taught in schools and preserved for future generations
- It gives Assamese cultural events official state recognition and holiday protection
- It represents Assam’s assertion of its distinct civilizational identity within the Indian Union
- It supports the documentation of Assamese intangible cultural heritage for UNESCO-level preservation efforts
How the Calendar Is Used in Daily Assamese Life
The Morning Ritual: Panjika Consultation
In traditional Assamese households, the Panjika is consulted every morning alongside prayer. The day’s tithi, nakshatra, and any special observances are noted. This practice connects daily life to a larger cosmic and agricultural rhythm — a form of mindfulness rooted in thousands of years of accumulated observation.
Gift-Giving: The Bihu Gamosa
The calendar determines when the gamosa (a white cotton cloth with red borders) is gifted. During Rongali Bihu, gifting a gamosa to elders, teachers, and guests is one of the most important cultural acts. The gamosa is tied to the calendar’s New Year — it is the tangible symbol of Bohag’s arrival.
The Assamese Diaspora and the Calendar
For Assamese people living outside Assam — in other Indian states, in the USA, UK, Canada, or Australia — the Assamese calendar app and digital Panjika have become essential tools for maintaining cultural identity. Knowing that today is 1st Bohag, even while living in London, connects a person to the cultural heartbeat of their homeland in a way no Gregorian date can.
Social Media and Digital Calendars
Digital Assamese Panjika websites and mobile apps (such as those at DrikPanchang.com for Assamese dates) have made the calendar accessible globally. Assamese WhatsApp groups mark Bihu dates weeks in advance, and Bihu New Year posts in Assamese script flood social media every mid-April — a digital continuation of an ancient cultural practice.
1Common Misconceptions About the Assamese Calendar
Misconception 1: “The Assamese calendar is just the Bengali calendar with different names.”
Reality: They share historical roots but diverged significantly. The Assamese calendar retained its lunisolar structure with tithis and intercalary months, while the Bengali calendar was reformed to a solar system in 1966. Religious timings differ considerably after the New Year.
Misconception 2: “Bihu is only a cultural performance — it has no calendar significance.”
Reality: All three Bihu dates are precisely determined by the Assamese calendar. Rongali Bihu falls on the 1st of Bohag, Kati Bihu on the 1st of Kati, and Magh Bihu at the end of Magh. The calendar IS the festival schedule.
Misconception 3: “The Assamese year 2026 CE corresponds to Bhaskarabda 2026.”
Reality: The Bhaskarabda era is 593 years behind the Gregorian. In 2025–2026 CE, the Assamese calendar year is 1432–1433 Bhaskarabda.
Misconception 4: “The Assamese calendar is becoming obsolete.”
Reality: With the Assam government’s official recognition in 2021, growing Assamese cultural pride, digital Panjika apps, and the global Assamese diaspora’s use of the calendar for cultural connection, the Bhaskarabda calendar is experiencing a revival, not a decline.
Expert Tips for Understanding the Assamese Calendar
Pro Tip 1: Learn the Month Names by Season
Group the 12 months by their agricultural or weather association: Bohag–Jeth (summer/planting), Ahar–Saon–Bhado (monsoon/growing), Aahin–Kati (harvest begins), Aaghun–Puh (harvest peak), Magh–Phagun–Sot (post-harvest/spring). This seasonal grouping makes the names instantly memorable and meaningful.
Pro Tip 2: Use the Bihu Trinity as Your Calendar Anchors
Even if you only remember three calendar points, remember: Bohag = April = Rongali Bihu = New Year; Kati = October = Kongali Bihu = prayers for crops; Magh = January = Bhogali Bihu = harvest feast. These three anchor the entire agricultural and cultural year.
Pro Tip 3: Understand the Sunrise Rule for Ritual Timing
When using the Assamese Panjika for auspicious timings, remember that a “calendar day” begins at sunrise. If the Panjika says an auspicious window begins at 6:45 AM on the 5th of Bohag, that is 6:45 AM from that sunrise onward. This differs from midnight-based Gregorian calculation and is crucial for ritual accuracy.
Pro Tip 4: The Gamosa Is Your Physical Calendar
Every time you see an Assamese person wearing or gifting a gamosa in a formal context, it is calendar time — either Rongali Bihu New Year, or a major cultural occasion. The gamosa is the physical embodiment of the Bhaskarabda calendar’s most important date.
Actionable Checklist: Connecting with the Assamese Calendar
- Download an Assamese Panjika app or bookmark DrikPanchang’s Assamese Panjika page
- Memorize the 12 Assamese month names and their approximate Gregorian equivalents
- Mark Rongali Bihu (mid-April), Kati Bihu (mid-October), and Magh Bihu (mid-January) on your yearly planner
- Learn the 6 Assamese seasons (Ritu) and connect them to the weather you experience in Assam or know from family stories
- Use the Bhaskarabda year number (Gregorian year minus 593) to date cultural events authentically
- Consult the daily Tithi and Nakshatra before scheduling important family events
- Learn the difference between Shuklapaksha and Krishnapaksha for auspicious timing
- Gift a gamosa on the 1st of Bohag to honor the Assamese New Year tradition
- Participate in Goru Bihu (cattle blessing ritual) if in Assam or follow it digitally to understand the calendar’s agricultural roots
- Share the Assamese Panjika date alongside the Gregorian date in cultural social media posts
(FAQ)
What is the Assamese calendar called?
The Assamese calendar is formally called Bhaskarabda (ভাস্করাব্দ). In daily use, the annual almanac based on it is called the Assamese Panjika (অসমীয়া পঞ্জিকা). The era is counted from the coronation of King Bhaskaravarman of the Kamrupa kingdom in the 7th century CE, placing it 593 years behind the Gregorian calendar.
How many months are in the Assamese calendar?
The Assamese calendar has 12 months: Bohag, Jeth, Ahar, Saon/Khaun, Bhado, Aahin, Kati, Aaghun, Puh, Magh, Phagun, and Sot. An intercalary (13th) month called Adhik Maas is added roughly every 2.5–3 years to keep the lunar and solar cycles synchronized.
When does the Assamese New Year begin?
The Assamese New Year begins on the first day of Bohag, which falls around April 14–15 in the Gregorian calendar. This day is celebrated as Rongali Bihu (also called Bohag Bihu) — the most joyful and widely celebrated festival in Assam. The exact Gregorian date may shift by a day in certain years due to the lunisolar calculation.
What is the difference between the Assamese Bhaskarabda calendar and the Gregorian calendar?
Several key differences: (1) The Bhaskarabda runs 593 years behind Gregorian. (2) It is lunisolar (integrates both sun and moon cycles), while Gregorian is purely solar. (3) A Bhaskarabda day begins at sunrise, not midnight. (4) It includes an intercalary (leap) month every ~3 years rather than just a leap day. (5) It tracks tithis, nakshatras, and pakshas, which the Gregorian calendar does not.
What are the three Bihu festivals, and when do they occur?
1. Rongali/Bohag Bihu (April) — marks the Assamese New Year and start of the agricultural year; the most celebrated festival. 2. Kongali/Kati Bihu (October) — a somber lamp-lighting festival during the crop-growing season when granaries are near-empty. 3. Bhogali/Magh Bihu (January) — harvest thanksgiving with bonfires and communal feasting.
Why is the Assamese calendar important for Assamese people?
The Assamese calendar is the cultural, agricultural, and spiritual backbone of Assamese life. It determines the dates of all Bihu festivals (the core of Assamese cultural identity), auspicious timings for marriages and ceremonies, farming activities tied to the rice cycle, and religious observances. It is also a symbol of Assamese civilizational distinctiveness and heritage, recognized officially by the Assam government since 2021.
Is the Assamese calendar the same as the Bengali calendar?
They share common roots but are not identical. Both use the same 12 Sanskrit-derived month names and start the New Year in mid-April. However, the Bengali calendar was reformed to a purely solar system in 1966 (removing tithis and intercalary months), while the Assamese Bhaskarabda retained its full lunisolar character. As a result, religious and ritual timings diverge significantly throughout the year.
What is the current Assamese (Bhaskarabda) year in 2026?
In 2026 CE, the Assamese calendar year is 1432–1433 Bhaskarabda (calculated as 2026 − 593 = 1433 for the year beginning in April 2026). The new Bhaskarabda year 1433 begins with Rongali Bihu in mid-April 2026.
Has the Assam government officially recognized the Bhaskarabda calendar?
Yes. In 2021, the Government of Assam officially announced the inclusion of the Bhaskarabda era in its official state calendar alongside the Saka and Gregorian systems. This decision, announced by Chief Minister Himanta Biswa Sarma, formally recognized the indigenous Assamese calendar at the state government level.
Where can I find the Assamese Panjika online?
The Assamese Panjika (daily almanac with tithis, nakshatras, and festival dates) is available on DrikPanchang.com (search “Assamese Panjika”), CalendarAssamese.com, and through several Assamese Panjika mobile apps available on Android and iOS. These provide the full Bhaskarabda date alongside Gregorian dates and daily auspicious timings.