The Lepchas have many cultural and religious festivities in their calendar year; but in the recent past Naambun or Naamsoong has gained significance among the Lepchas. Through this descriptive research article we shall break down the festival into detailed parts, try to see its importance, significance and how imbibed it is in the Lepcha fabric. This article shall try to shed some light into how some important social and cultural traits came into being just through this festival. These kinds of festivities are on the decline due to assimilation and change of religion and this study will reflect on the work being done by various organisations of the Lepchas in reviving their age old customs.