What is Panchang? Complete Guide to Tithi, Shukla Paksha, Krishna Paksha and the Hindu Calendar

Introduction

The Gregorian calendar, which we commonly use today, is not originally part of the Indian tradition. The ancient Indian sages developed a far more sophisticated system known as the Panchang, based on the movements of the Sun and the Moon.

Our ancestors carefully observed how solar and lunar energies affect Earth and human life. Based on these observations, they designed a system that not only tracks time but also helps individuals understand their physical, mental, and spiritual energies.

The Panchang is therefore not just a calendar — it is a guide to living in harmony with cosmic energies.

What is Panchang?

The word Panchang means “five limbs”.

Traditionally, a Panchang contains five elements:

1. Tithi – Lunar day

2. Vaar – Day of the week

3. Nakshatra – Constellation

4. Yoga – Astronomical alignment

5. Karana – Half of a lunar day

Among these, Tithi plays an extremely important role in determining festivals, rituals, and auspicious timings.

Saka Samvat and Vikram Samvat

Two important traditional Indian calendar systems are widely known:

1. Saka Samvat

• Based primarily on the Sun (Solar system)

• Adopted by the Government of India as the National Calendar

2. Vikram Samvat

• Based on both Sun and Moon (Lunisolar system)

• Used in determining Hindu festivals, religious rituals, and auspicious timings (Muhurta)

This is why most Hindu festivals such as Diwali are calculated using Vikram Samvat.

Indian Months vs Gregorian Months

Unlike the Gregorian calendar (January–December), the Indian calendar follows lunar months such as:

These months are based on lunar cycles rather than fixed dates.

Lunar Month and Paksha

A lunar month is divided into two parts called Paksha:

Shukla Paksha

• From New Moon to Full Moon

• Moon gradually increases in brightness

• Represents growth and expansion

Krishna Paksha

• From Full Moon to New Moon

• Moon gradually decreases in brightness

• Represents withdrawal and introspection

Each Paksha contains 15 Tithis, making 30 Tithis in one lunar month.

What is a Tithi?

A Tithi is not a calendar date like we see in modern calendars.

Instead, it is determined by the angular distance between the Sun and the Moon.

Every 12 degrees of angular movement between the Sun and Moon creates one new Tithi.

So whenever the angle increases by 12°, the Tithi changes.

Because of this, a Tithi does not necessarily start or end at midnight.

How Tithi is Calculated

In Saka Samvat, the Tithi present at sunrise is considered the Tithi of that day.

However, for auspicious rituals and Muhurat, the Vikram Samvat system is generally used because it considers the exact lunar timing more precisely.

How Lunar Energy Affects Humans

The Moon has a strong effect on Earth — especially on water and biological rhythms.

Similarly, ancient sages believed that the Moon influences Som Ras, a subtle energy associated with mental balance, emotions, and vitality.

• During Full Moon (Purnima) → Som energy is highest

• During New Moon (Amavasya) → Som energy is lowest

This fluctuation affects human emotions, sensitivity, and mental stability.

Important Tithis and Their Energetic Effects

Certain Tithis are believed to influence human psychology more strongly.

Ashtami (8th Tithi)

• Associated with karma patterns

• Old habits and emotional patterns may surface

Chaturdashi (14th Tithi)

• Known as edge-of-the-cliff energy

• Sensitivity and fear may increase

Amavasya (New Moon)

• Som energy becomes almost absent

• People may feel low energy, anger, or emotional heaviness

Because of these effects, traditions advise fasting, charity, or spiritual practices on these days.

Major decisions or important beginnings are generally avoided on such Tithis.

Ancient Origins of Panchang

Many aspects of the Panchang system are believed to originate from the Bhargava tradition established by Sage Bhrigu.

References to Purnima (Full Moon) and Amavasya (New Moon) can also be found in the Rigveda, one of the oldest known texts in human history.

Although the names of some Tithis were added later, the core astronomical observations are extremely ancient.

Why Panchang Still Matters Today

The Panchang system helps us understand:

• The energetic rhythm of nature

• The connection between cosmic movements and human emotions

• The best timings for rituals, decisions, and spiritual practices

When people understand why their energy or emotions fluctuate, they can manage their lives more consciously.

In this way, the Panchang becomes not just a calendar but a tool for self-awareness and spiritual growth.

Conclusion

The Panchang is a profound blend of astronomy, spirituality, and human psychology.

Developed by ancient sages through careful observation of the Sun, Moon, and cosmic rhythms, it continues to guide millions of people even today.

Understanding this system allows us to reconnect with nature’s cycles and the wisdom of Sanatan Dharma.

As we rediscover these ancient insights, the Panchang reminds us that time is not just measured — it is experienced through energy.

Har Har Mahadev.