Leaving the country for more than 6 months/green card

[half2005]

I would like to know what happened if I am a peminent residence and I leave the U.S. for more than 6 months? What is the law in this regards? Do they know at the airport that I have been outside the U.S. for more than 6 months? Where can I find more information about this topic?

Thanks in advance

[Georgi]

Let me add something to that question which is also not fully clear to me. Is the day of leaving the U.S. considered a day in presence in the States or not? On the other hand is the day of the arrival in the U.S. considered a day spend in the U.S or not? I know it is tricky, therefore I ask about that. Thanks.

[476477]

it is on their instruction that partial days spent in USA, count toward days spent in USA

[curtdfw]

Do they know at the airport that I have been outside the U.S. for more than 6 months?
Thanks in advance

Yes, they will know at the airport how long you have been out of the country.