days

I am not a professionnal at all, this is my first attempt at growing cannabis, a friend of mine had regular seeds that he gave me so I gave it a shot outdoors, no idea of the strain or whatever. The thing is that the weather were I live change depending on the day, it's not always hot and sunny...

I notice that people very commonly say that they harvested at "day 60" or "week 3" of flowering and it's how many recommend the general harvesting time for a certain strain. When I see this I'm assuming they are indoors and the flowering days start when switching lights to 12/12 but does this...