Hi. I'm Aliza, the site's unofficial Medical Librarian.
I believe that you're considered a Survivor starting from the date of your diagnosis until the present (whenever that is). That is different from being considered "Cancer free" or "in remission". "Cancer free" is fairly self explanatory. You're considered to be "in remission" when you're "cancer free" for five years. As long as you're alive you're a survivor.
Currently, I'm a survivor and I'm about to celebrate 4 months of being Cancer free.
I hope that I made these distinctions a bit more clear. If you have any further questions or anything else I can help with, feel free to message me here or email me offsite.