I'm here in the US with F1 visa, i got a job offer and my employer is willing to apply for H1B for me, i understand that if my H1B went through i can start working in October 1st, 2014 but i might finish school in the end of December, 2014 and i don't want to start work while i'm studying. I would rather start working after i'm done with school. My question is: If my H1B went through, can i start working in December, 2014 or January, 2015? or i will Have to start working in October 1st? Will this have any negative effect if i started working in December or January? Thank you.