White House "full lid" calls, signaling no further presidential or vice presidential events, hinge on daily public schedules released each morning, with trader odds reflecting end times of official engagements like briefings, travel, or meetings. Recent patterns show lids averaging after 6 PM ET on weekdays with late-afternoon activities, but earlier on quieter days or post-travel returns; for March 23-28, March 25 featured a New Hampshire trip concluding mid-afternoon, boosting early-lid probability, while March 26's Baltimore bridge response spurred evening remarks, delaying it. Upcoming catalysts include March 27-28 schedules amid campaign prep and diplomatic calls, where deviations from published times—often due to unscheduled gaggles—could sway outcomes, underscoring the market's sensitivity to real-time pool reports.