Loestrin 24e, just started the pill?

Ok I just started on Loestrin 24 e yesterday on the first day of my cycle. I am going to take it everyday at 11 a.m. because I do not wake up at the same time everyday or go to sleep at the same time everynight. What time frame do I have for this to still be effective? Is it ok to take it a couple hours early or a couple hours late? The pamphlet that came with it says that even if you miss a pill and take it when you remember (even if this means taking two pills in one day) Does not require a back up form of birthcontrol so I figure a couple hours wouldn't hurt but thought I better make sure. I don't plan on ever needing to take it a couple hours late but just curious