Example 1: Mike left the United States on March 1 and returned on April 1. Counting March 2 through March 31, he was outside the United States for 30 consecutive days; thus he is also deemed to be outside the United States for 30 additional consecutive days. Therefore, for April 1 through April 30, he is deemed to be outside the United States and not eligible for the calendar month of April. Payments start effective May 1.
Example 2: Mary left the United States on April 15 and returned on July 1. Counting April 16 through June 30, she was actually outside the United States and not eligible for the calendar months of May and June. Since she was absent for more than 30 consecutive days, she is deemed to be outside the United States for 30 additional consecutive days. Therefore, for July 1 through July 30, she is deemed to be outside the United States and not eligible for payment until July 31.
20 C.F.R. §416.1327