I'm not sure what fire represent to you, to me it cleanses, purifies, etc.
Is someone pregnant & due at that time because it may represent that a child (pure spirit) will come forth.
Not sure if this information will help you :
CALCINATIONis the first of seven major operations in the alchemy of transformation.
Chemically, the Calcination process involves heating a substance in a crucible or over an open flame until it is reduced to ashes. In the Arcanum Experiment, Calcination is represented by sulfuric acid, which the alchemists made from a naturally occurring substance called Vitriol. Sulfuric acid is a powerful corrosive that eats away flesh and reacts with all metals except gold.
Psychologically, this is the destruction of ego and our attachments to material possessions. Calcination is usually a natural humbling process as we are gradually assaulted and overcome by the trials and tribulations of life, though it can be a deliberate surrender of our inherenthubrisgained through a variety of spiritual disciplines that ignite the fire of introspection and self-evaluation.
Physiologically, the Fire of Calcination can be experienced as the metabolic discipline or aerobic activity that tunes the body, burning off excesses from overindulgence and producing a lean, mean, fighting machine. Calcination begins in the Base or Lead Chakra at the sacral cup at the base of the spine.
InSociety, the Calcination is expressed in the lives of revolutionaries, conquerors, and other warriors who try to overthrow the status quo.
On thePlanetarylevel, it is the Fire of creation, the formation of a livable environment from molten matter and volcanic ashes.