Following list of ИСККОН festivals has been created independent of Гаурабда Календарь or GCal published by GBC Вайшнав Календарь Комитет of the Международное общество сознания Кришны (ИСККОН). However it follows same rules for Фестивали, Экадаши and Парана time as those followed by GCal. Ideally both calendars should match and if you find any mismatch it might be due to software error in either of the software.