A task depends on two other tasks

after accepts several ids separated by spaces: Dress rehearsal :d1, after b2 b3, 2d starts after the later of the two.

The text is too small

Export at 3x or as SVG. Shorten long task names, or split a long timeline into two charts.

Can I add an owner to each task?

Write it into the task name: Venue and vendors (Admin, Sam). Mermaid Gantt charts have no separate owner field.

Event Planning Gantt Chart Template

Previewed in the “Cinnabar” theme; you can switch themes in the editor

When to use it

Company events, campus events, product launches and conferences. Three preparation tracks run in parallel (venue, programme, materials), promotion overlaps with preparation, and the event day is a milestone.

Making it yours

Change the event name on the title line and the start date on the first task.
Swap the preparation tasks for your event type: booth construction and exhibitor recruitment for a trade show; registration, heats and finals for a competition.
Add crit, to highlight a track.

Mermaid code

event-planning-gantt.mmd

gantt
    title Annual event preparation
    dateFormat YYYY-MM-DD
    axisFormat %m-%d
    todayMarker off
    section Planning
    Theme and budget :a1, 2026-11-02, 5d
    Plan review :a2, after a1, 2d
    section Preparation
    Venue and vendors :b1, after a2, 10d
    Programme and rehearsals :b2, after a2, 20d
    Materials design and print :b3, after b1, 10d
    section Promotion
    Invitations and registration :c1, after b1, 12d
    section Execution
    Dress rehearsal :d1, after b2, 2d
    Event day :milestone, d2, after d1, 0d
    section Wrap-up
    Settlement and retrospective :e1, after d2, 5d

Ask an AI for one with this structure

Send the prompt below to ChatGPT or Claude, then paste the whole reply into the editor; the code inside is detected automatically.

prompt.txt

Draw an event preparation schedule as a Mermaid gantt chart with dateFormat YYYY-MM-DD and five sections: Planning, Preparation, Promotion, Execution, Wrap-up. Theme and budget 5 days, plan review 2 days; venue and vendors 10 days, programme and rehearsals 20 days (in parallel with venue), materials design and print 10 days; invitations and registration 12 days; dress rehearsal 2 days and event day as a milestone; settlement and retrospective 5 days. Start on 2026-11-02. Output only the mermaid code block.

FAQ

A task depends on two other tasks: after accepts several ids separated by spaces: Dress rehearsal :d1, after b2 b3, 2d starts after the later of the two.
The text is too small: Export at 3x or as SVG. Shorten long task names, or split a long timeline into two charts.
Can I add an owner to each task?: Write it into the task name: Venue and vendors (Admin, Sam). Mermaid Gantt charts have no separate owner field.

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Updated 2026-09-05