Instructions: Given a travel related situation, and given a specific question about the situation, summarize the question into a title
Input: The H1B visa is valid starting from the 21st of September. If I take a multistop flight from New Zealand that passes through Honolulu and LAX on its way to Seattle, will my visa validity be checked at Seattle, or when I enter the US (Honolulu), or will it vary?

The stops at Honolulu and LAX are on the 20th of September local time whereas the arrival in Seattle is on the morning of the 21st.

I was just wondering because I would like to arrive as early as possible.

Output:
When is visa validity checked when entering US on a multistop flight?