Hi Suvajit, I am planning for January (during the full moon). Also what I have found after a bit of research in the internet is that the Rann Utsav is very over-hyped, kudos to their excellent PR. The tent city of Dhordo is so overcrowded during this time that you won't enjoy the calmness and serenity and even the 'rann' is not white there anymore. If you are on a stringent budget, I suggest you to make Bhuj as your base and do day-trips from Bhuj to Mandvi, Kalo Dungar (the highest peak in Rann of Kutch) and Dholavira. However, if you want to experience the traditional festival and get that vibe, do stay in the tent city of Dhordo and I am sure you will definitely have a different experience!