Significantly the ancient Egyptians termed the sun as Amon Ra or which is simply known as "Ra". In Latin, the syllable Ra is used or known as to connote light. For example, we have radiance which emits light or radium which means any substance that emits light or brilliance. The common element is the syllable Ra that in many languages are used to derive from words for describing Sun or light.
The occurrence of this syllable in most names used for Lord Rama along with other clues is strongly suggestive for the festival of Ramnavami antedates the R- Ayana and which have been originated much before the Ramayana Known as a 'Sun-festival' for invoking the Sun and was recognized as the source of light and heat even in ancient times.
The importance of the Sun was much more in the higher latitudes from the place through which the Aryans have migrated into India. Many royal dynasties portrayed the symbol of virility like the Sun, Eagle, Lion etc. As their progenitor Lord Rama's dynasty considered them to have descended from the Sun. This could have led to the tagging on Lord Rama's birthday to a festival devoted to the sun. The Ramayana is the divine story of the time when Lord Vishnu manifested on Earth in the form of Lord Rama.Teachings of Ramayan
The Ramayana gives us the message on life and teachings of Lord Ramchandra. The word "Rama" literally means one who is divinely blissful and who gives joy to others and one in whom the sages rejoice.
It is said that the repetition of his name (Rama Nama) is the surest, fastest and easiest way to attain purity, peace, wisdom, understanding, joy, prosperity and ultimately liberation. Lord Rama Himself said that "Repetition of My name is equal to the repeating of one thousand names of God and Goddess or repeating of mantras one thousand times." Lord Rama was the perfect person he embodied the divine on Earth and taught us how to live our lives in accordingly to dharma and divine principles.
Lord Rama was the man of compassion, gentleness, kindness, rightness and integrity. Although he had all the power in the world he still was peaceful and gentle. Through careful examination of his life, we learn how to be a perfect son, a perfect brother, a perfect husband and most important the perfect king. His reign in Ayodhya is referred to as Ramarajya, the epitome of perfect governance.