Prime Minister Narendra Modi celebrates his 70th birthday today (Thursday). A 70kg ladoo offered at a Coimbatore temple, Sardar Sarovar dam storage will be filled up to its maximum level and special Narmada puja will be performed to mark the occasion. Moreover, BJP president JP Nadda will participate in various welfare activities at Chandni Chowk here as part of 'Sewa Saptah' (week of service) programmes undertaken by the party to mark PM Modi's birthday.