Planners use "timeline" and "checklist" interchangeably. They're not the same thing, and confusing them is how details fall through the cracks.

Timeline = When Things Happen

A timeline is a chronological schedule for the event day itself. It answers: what happens at what time?

• 4:00 PM — Ceremony begins
• 4:30 PM — Cocktail hour
• 5:30 PM — Reception entrance
• 5:45 PM — First dance

Timelines are shared with vendors, the wedding party, and sometimes guests. They keep everyone synchronized on the day of the event.

Checklist = What Needs to Get Done

A checklist is a task list for planning and preparation. It answers: what still needs to happen before the event?

• ☐ Confirm florist delivery time
• ☐ Send final guest count to caterer
• ☐ Print place cards
• ☐ Confirm transportation for bridal party

Checklists are internal. They're for you (and maybe your client). They track progress over weeks and months, not minutes and hours.

Where Planners Go Wrong

Mistake 1: Using a checklist as a timeline. "Set up centerpieces" is a checklist item. "11:00 AM — Florist sets up centerpieces (Reception Hall B)" is a timeline item. Vendors need specific times and locations, not task lists.

Mistake 2: Using a timeline as a checklist. Putting "confirm DJ playlist" at 9:00 AM on the day-of timeline. That should have been done a week ago. If it's on the day-of timeline, it's already too late.

Mistake 3: Only having one. A checklist without a timeline means you did all the prep but nobody knows the day-of schedule. A timeline without a checklist means the day-of plan is great but you forgot to order the cake topper.

How They Work Together

The checklist feeds the timeline. As you check off planning tasks, they generate timeline items:

Checklist Item (Weeks Before)	Timeline Item (Day-Of)
☐ Confirm florist delivery time	10:30 AM — Florist arrives, begins setup
☐ Finalize ceremony readings	4:05 PM — Reading by Sarah (Corinthians 13)
☐ Book shuttle service	4:45 PM — Shuttle departs church → reception
☐ Confirm DJ must-play list	8:00 PM — Open dancing (must-play set)

Every completed checklist item should have a corresponding entry in the day-of timeline — with a specific time, location, and responsible person.

What Goes on Each

Day-Of Timeline Should Include:

• Specific times (not ranges — "4:00 PM" not "afternoon")
• Location for each item (especially if multi-venue)
• Who's responsible (vendor name or role)
• Setup and breakdown windows
• Buffer time between major transitions

Planning Checklist Should Include:

• Due dates (not event-day times)
• Owner (who's handling this task)
• Status (not started / in progress / done)
• Dependencies (can't do X until Y is confirmed)

Tools for Each

For timelines: Use a dedicated timeline tool that produces something shareable and readable. Vendors won't squint at your project management app. EventRundown lets you build a timeline in seconds and share filtered views with each vendor.

For checklists: Use whatever works for your workflow — Asana, Trello, a spreadsheet, or a paper list. EventRundown Pro also includes built-in to-do lists attached to each event.

The point isn't the tool — it's having both, and knowing which one to share with whom. Vendors get the timeline. You keep the checklist.