The problem of having a distinct Sikh calendar like the calendars of some other nations and religious has not been completely solved despite the sincere hardwork done by some Sikh scientists and Sikh historians. The latest Nanakshahi Sikh calendar prepared by a Sikh scientist Paul Singh Purewal and authenticated by both S.G.P.C. and Sri Akal Takhat and promulgated all over the globe for Sikh society has once again been amended and distorted by some political vested interests. However, the efforts for preparing such are error-free Solar Sikh calendar have been made for the last many years. The present book highlights the really unique and rare work done by its highly inquisitive and committed Sikh historian author in laying down the basic parameters of a solar Sikh calendar and fixing the dates of the birthdays of the ten Sikh Gurus. The author believes and proves the Sikh calendar should be based on solar movements because it will result in permanent and correct fixation of Gurpurbs and give a distinct identity to the Sikh almanac as well as Sikh religion. The author's relentless efforts to sort out the lunar and solar movement differences and then fixation of Gurpurbs are really admirable. His approach is systematic, scientific and logical.