Both summers I started around May 10. That said, I have seen plenty of people get special consideration from firms for weddings and such. They are not going to hold getting married against you. In most cases, as a 1L, at the very most the firm will want you to work 10 weeks with them and the summer is usually much longer than ten weeks. My advice, schedule the wedding/honeymoon for right after spring exams end and then you can start working after that. Focus on getting the grades to merit a summer associate position, then interview, get the offer, then talk dates of employment.