Kaywoods

Question: Can you finish this pattern? j, f, m, a, m, j, j, a, s, o, n, _?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?

Question: During what month do people sleep the least?

Question: When is 99 more than 100?

Question: What can be broken but never forgotten?

Question: What gets broken without being held?