The New York Times cites two Iranian officials saying Tehran waited until after
local midnight to finalise a U.S.-Iran agreement to avoid the timing coinciding
with President Trump’s birthday on the 14th (U.S. Eastern Time). The 7.5-hour
time difference allowed each side to claim the agreement was completed on its
preferred date; Trump had said the deal would be reached on Sunday, while Iran
said it would be reached a day later.