Around the beginning of March, you can get free Callisto tokens, on a 1:1 basis, if you hold Ethereum Classic.
There is no exact date at the moment because if it's related to a specific blockchain height. The snapshot is going to happen
at 5500000, and it's at 5239603 now. You can check it here: http://gastracker.io/
Probably you know how the Bitcoin Cash, Bitcoin Gold forks affected Bitcoin's price last year. Nxt skyrocketed, Zcl too...
Also, how it affected Nxt's price when the news started to spread.
Be careful though around the snapshot time. Many people take profit before it happens. I'm preparing to do the same if ETC goes crazy because after the forks happen, most of the people sell it quickly and the price drops heavily.
You can get more information about the free Callisto here:
https://forum.ethereumclassic.org/t/the-callisto-network-information-please-create-new-topic-in-order-to-better-assist/533
I will also give a technical analysis of ETC too in the future.