Hi guys

I got a job offer today (30/05/12) My wedding is on the 17/06/12 and I'm gt back on my honeymoon on the 4th July. I asked if starting in the 5th July would be fine and they said yes. I have to have a half day unobtrusive operation and the earliest I can gt that done is 11th July which will go frm 7 am to 12pm afternoon. I didn't tely I needed to start on the 5th and they didn't ask but nw my fiancé and family are saying I'm going to be too jet lagged. Should I call them and c if I can push bk the date 1 week? I don't want to start badly or lose the job! HELP! I don't have a contract and haven't signed anything yet.