There are many rituals that are followed during Karthika Masam in South India, mainly in Andhra Pradesh and Telangana states. ‘Akasha Deepam’ is one among several rituals of Karthika Masam.
In 2017, Akasha Deepa Vratham begins on October 20 and ends on November 18 as per Telugu, Kannada, Marathi & Gujarati calendars. In North Indian Hindi calendars, it ends on November 4, 2017.
Akasha Deepa Vratham is a month-long Vrata observed from Kartika Shukla Padyami (1st day of Karthikam) to last day of Karthika (Karthika Amavasya). A long wooden pillar is installed in front of the house and on that Deeparadhana is performed as a tribute or gratitude towards Lord Shiva, Lord Vishnu or any other God.
And in some other places, the lightened diyas are left into the sky with the help of some balloon kind of thing.