Not all chickens follow the general rule of fall molt. They can molt at any time for lots of reasons. If they're deprived of adequate food, they will molt. If they're frightened, it can trigger a molt. Some youngsters go through a partial "juvenile" molt before they're a year old. Sometimes a chicken can start molt and not finish it, remaining in a half bald state for a year or longer.
So, generally, you can expect to see a whole lot of feathers in the coop and run come fall and early winter. But any chicken can defy this and decide to molt in mid-summer, mid-winter, or molt but you can hardly tell because they lose and replace feathers so discretely.
Usually, you can expect your hens to molt one year from when they first begin to lay. Okay?