Dont worry about it. I did this last Sunday I think. Same type of thing, out all day, had my brekkie one at 12.30 and then had my 5pm one at 8.30pm.... I intended to have the last one about 10pm but before I knew it, the clock said 10am!!
Try not to do it otherwise you could end up in 'starvation mode' but dont panic if it was a slip up, these things happen!!