The British Open starts earlier than a tournament here on this side of the pond. So you need to set your players earlier than normal!
Because the British Open Championship tees off at 6:30am local time (10:30pm PDT) on Thursday, July 20th, the deadline to select golfers has changed for this week. You must set your roster by 10:30pm PDT, Wednesday, July 19th. The deadline to set your active foursome for each subsequent round will also be 10:30pm PDT the night before each round is due to begin.
This change applies only to the British Open and will not affect deadlines for other tournaments.