New Delhi, Sep 28 (UNI) Prime Minister Narendra Modi on Saturday greeted the nation on the auspicious occasion of Mahalaya. Taking to micro-blogging site Twitter, Mr Modi said,”Shubho Mahalaya! We pray for the abundance of happiness in our lives. May everyone be healthy and prosperous. May the blessings of Maa Durga always remain on our society.” The day of Mahalaya marks the beginning of Devi Paksha and the end of the Pitri Paksha. People believe that on this day, Goddess Durga officially begins her journey from Mount Kailash, where she resides with her husband Lord Shiva to her maternal home on Earth. It is believed Goddess Durga undertakes this week-long journey with her children– Ganesha, Kartik, Lakshmi and Saraswati. Mahalaya is celebrated seven days before Durga Puja.