Hindu Festival Calendar: Diwali, Holi, and Seasonal Timing

A Calendar Rooted in Nature

The Hindu calendar, known as Panchang, is a sophisticated lunisolar system that has governed the timing of festivals, rituals, and agricultural activities across South Asia for thousands of years. Like the Hebrew calendar, it uses lunar months with periodic adjustments to stay aligned with the solar year. Unlike a single unified system, there are multiple regional variants, which is why the same festival may be celebrated on different dates in different parts of India.

How the Hindu Calendar Works

The Hindu calendar has twelve lunar months, each divided into two fortnights: Shukla Paksha (the bright half, waxing moon) and Krishna Paksha (the dark half, waning moon). Each fortnight has 15 tithis (lunar days). The full moon day is Purnima, and the new moon day is Amavasya.

Regional Variations

Northern India (Purnimant system) begins months on the day after the full moon, while Southern India (Amant system) begins months on the day after the new moon. This creates situations where the same month name refers to slightly different time periods. Additionally, the Hindu New Year starts on different dates depending on the region: Ugadi in Karnataka and Andhra Pradesh, Gudi Padwa in Maharashtra, Puthandu in Tamil Nadu, and Vishu in Kerala.

Leap Months

To keep lunar months aligned with solar seasons, an extra month called Adhik Maas (also Purushottam Maas) is inserted approximately every three years. This ensures that Diwali always falls in autumn and Holi always falls in spring, despite the shorter lunar year.

Diwali: Amavasya of Kartik (October-November)

Diwali, the Festival of Lights, is celebrated on the new moon of the Hindu month of Kartik. The five-day celebration begins with Dhanteras, followed by Naraka Chaturdashi, the main Diwali night, Govardhan Puja, and Bhai Dooj.

Why It Moves

Because Kartik Amavasya depends on the lunisolar calendar, Diwali shifts between mid-October and mid-November on the Gregorian calendar. In some years it falls close to Halloween; in others, it is well into November.

Regional Celebrations

In northern India, Diwali celebrates the return of Lord Rama to Ayodhya. In western India, it marks the beginning of a new financial year for many businesses. In eastern India, the goddess Kali is worshipped. In southern India, Naraka Chaturdashi (the day before Diwali) often receives more emphasis. Each region brings its own food, rituals, and customs, but the lighting of diyas and the exchange of sweets are universal.

Holi: Purnima of Phalguna (February-March)

Holi falls on the full moon of the Hindu month of Phalguna, placing it in February or March. The festival celebrates the arrival of spring, the victory of good over evil, and the playful love of Krishna and Radha.

The Two-Day Festival

Holika Dahan on the eve features bonfires that symbolize the burning of the demoness Holika. The next morning, Dhulandi brings the famous color play. People smear each other with colored powders and spray colored water, breaking down social barriers in a day of joyful abandon.

Navratri and Durga Puja: Ashvin (September-October)

Navratri, meaning nine nights, is celebrated twice a year, but the autumn Sharad Navratri in the month of Ashvin is by far the most prominent. In Gujarat, it features Garba and Dandiya Raas dancing through the night. In West Bengal, the last four days become Durga Puja, one of the grandest festivals in eastern India, with elaborate pandals (temporary structures) housing magnificent clay idols of the goddess Durga.

Dussehra: The Tenth Day

Vijayadashami, or Dussehra, falls on the day after Navratri. In northern India, it features dramatic Ram Lila performances and the burning of towering Ravana effigies. In Mysuru, a grand royal procession draws thousands.

Ganesh Chaturthi: Bhadrapada (August-September)

The festival honoring the elephant-headed god Ganesha is especially grand in Maharashtra, where massive public installations of Ganesha idols are worshipped for up to ten days before immersion in rivers or the sea. Mumbai's celebrations draw millions and create significant traffic and logistics challenges.

Planning With the Hindu Calendar

For businesses operating in India, the autumn festival season from Navratri through Diwali is analogous to the Western Christmas season in its commercial significance. Consumer spending peaks, offices may close for extended periods, and travel demand surges. The dates shift each year, so consulting a Panchang or an online Hindu calendar converter at the start of each year is essential for accurate planning.