Change reminder timing

Move the start-time reminder for Monday's leadership briefing from 30 minutes before to 60 minutes before. Keep the 2-hour prep email intact for directors but change my personal popup to 90 minutes before so I can prepare slides. Apply these changes to the existing event without creating a duplicate.

Before I change Monday's briefing reminders, make it easier for the exec team to be on time: show the new timings clearly at the top of the event, explain why the shift helps slide prep, and highlight any attendees whose calendars will conflict so I can propose a different timing if needed.

The leadership briefing is set with a 30-minute reminder and I need more prep time, but the execs are used to the current rhythm. I'm worried changing it will upset routines or cause missed attendance. Should I shift the group reminder to 60 minutes and add a personal 90-minute reminder, and how should I communicate that change to avoid complaints?

Over recent quarters I’ve adjusted reminder timings often and either annoyed senior stakeholders or failed to improve on-time starts. Where is the pattern—lack of a standard, failing to consult key attendees, or inconsistent personal prep—and what one rule should I set for reminder changes to preserve rhythm and attendance?