Hours for insulin

Hello everyone, my name is Nestor, almost 60, and although I am diabetic for about 13 years, I just have to apply insulin.(10 units once a day)
I was told that it was very important to respect the time.Therefore, I chose 8 in the morning, which I know that I am already awake and without leaving home.
However, I have a problem and I need advice.I travel very often for work.Always to places with 5 to 7 hours apart.(America) Therefore, during the trips I should notice at 3 or 1 in the morning to meet the schedule.
In that case, if my trip lasts more than a week, can I advance or delay the application for a couple of hours and not cut the break?
Thanks in advance for your help.
Nestor

Yes, you can vary an hour every day for a few day before, until you are at the time that you are interested.
To advance one or two hours, you will have no problem, but if you retresses it more than an hour, you can upload the glucose ..

Thank you very much, with that it is enough for me.