I expect some of you could answer "depends". So here are some clues. The project involved a development and maintenance of scalable server side system with high availability.
So the project "lifetime" wasn't only limited to me, sitting on a chair and writing some code. During my free days or hours (even when I was sleeping) the system was running all the time and I often was involved in reasoning the results of what happened when I was away. Then, basically all my gained experience is based on a 24/7 process of the running system and a long-range set of higher level causes and effects like speaking with the customer or aggreeing some solution after speaking with him.
From my point of view this means 1 year of experience. I would like to know your opinion on this, especially if you agree, please share what would you tell to someone who is of a different opinion.