For those of you who are new to Obaitori and yoga, here are a few important points for the Red Tent on havan, mantra and sankalpa.
Please understand that havan, mantra and sankalpa are not religious exercises.
In brief -
Havan - a purifying fire ritual.
Mantra - sound vibration to activate the conscious mind creating an inner awakening.
Sankalpa - a short positive statement, a resolve to change your life for the better.
We are beginning the Red Tent celebration with a havan. A havan (pronounced hawan) is a purifying ritual from the yogic roots of India. It involves a fire ceremony by invoking the divine energies of fire (agni).

Almost every ancient culture in this world acknowledges fire as a powerful and mystical force and uses fire as as an integral part of worship.
Havans are age old rituals used to invoke positive energies into our lives and into the environment. The fire is used as a medium for the attainment of various wishes, both material and spiritual.
At this havan we will be chanting the Gayatri mantra over the fire.
The Gayatri is a revered mantra recited in the ancient language of Sanskrit.
It may be translated as meaning, 'You/the universe/nature/God are the giver of life, the remover of pain and sorrow, the bestower of happiness. Just as the sun illuminates the darkness may your purifying rays enlighten our minds.'
In this way we will be praying for healing and wisdom.
After each mantra, we will say, "swaha" which can be translated as meaning, ‘I make this offering of my self’. We then make offerings into the fire of ghee and grains and herbs.
Many people experience a profound tangible healing presence during havans, which can manifest in their lives and the environment around them.
The Gayatri Mantra;
om bhūr bhuvah svah
tát savitúr váreniyam
bhárgo devásya dhīmahi
dhíyo yó nah pracodáyāt
We start the havan by chanting mantra. Mantras were discovered in higher states of meditation, when yogis started to explore the different layers of the mind to discover the source of existence.*
The yogis also perceived in their state of observation that by chanting a particular sound you are able to stimulate the chakras. If, for example, a long rope is tied to a tree trunk and you shake it, you will see the effect, the wave travels from one end of the rope to the other. Similarly, if the sound of a frequency is audibly spoken, the ripples of the vibration reach the other end, activate and touch the psychic centre.
So, in order to create a particular state of consciousness the yogis combined the sounds, and thus emerged mantras like Om namaha Shivaya, Om namaha bhagavate Vasudevaya, and others.
People started to think that Om Ramayah namah is a Rama mantra, Rama being the historical/mythological personality who lived at a certain time and place. Mantras started to be associated with people’s beliefs and understanding. Krishna mantras became associated with Krishna, Shiva mantras with Shiva, Devi mantras with Devi.
However, mantras precede such identification with belief systems, and the classical and committed yogic traditions have remained true to the original purpose of the mantra, which is inner awakening.
Many of you have asked about a definition of the mantra, Hari Om Tat Sat. Basically it means that form and the formless, are both one. Please go here for that definition.
* All text italics are written by Swami Niranjan. Swami means one who has mastered their mind.
Sankalpa is a positive resolve, a determination that one makes to improve their life. The sankalpa is a private statement that is mentally repeated at the havan and other yogic practices like yoga nidra. The statement is sacred and kept to oneself in order to contain it's energy.
A bit more from Swami Niranjan;
Many people say it is a positive affirmation, a positive thought, but sankalpa is a process of training the mind to develop the will and to develop clarity of thought. Through sankalpa we learn how to train the mind so that the will becomes alive.
The sankalpa takes time to formulate. It might take up to two years to word the sankalpa and to work out what you want in life.
A sankalpa is a short sentence, said in the present tense in a positive way. Some examples, "I honour my mind, body and soul." "I live a balanced life." "I am in control of my mind." "I love and accept myself, exactly as I am."
The following quote might help you to formulate your sankalpa.
"What kind of future do I envision for myself? What kind of self am I trying to develop? What do I want to accomplish in my life? The thing is to paint this vision of your life in your heart as specifically as possible. That 'painting' itself becomes the design of your future. The power of the heart enables us to actually create with our lives a wonderful masterpiece in accordance with that design" ~ Daisaku Ikeda.

You can read more about the Red Tent 1 and 2 here.
For the winter solstice Red Tent you might wish to bring the following; something special to place on the havan altar to 'charge' up for the year, slippers and socks to keep your feet warm, flowers to decorate the altar, a candle that you can light on the night and take with you to use at home to be reminded of your sankalpa and any determinations you made on that evening.