Plan a work event, offsite or team celebration

Help me plan a work event so nothing is forgotten. I need a timeline, a task checklist, budget lines and a plan for the day itself.

Event: {{event}}
What it should achieve: {{purpose}}
Date and place: {{date_and_place}}
Attendees: {{attendees}}
Budget, and what it must cover: {{budget}}
Already arranged: {{already_arranged}}
Rules or approvals that apply (company policy, expenses, travel): {{rules}}

Produce:
1. Timeline checklist, working backward from the event date in stages: 8 or more weeks before, 4 to 6 weeks before, 2 weeks before, the week of the event, the day itself, and the week after. Each item starts with a verb and has an Owner, set to "[to assign]" unless my notes name someone. Skip anything already arranged.
2. Budget lines: a table with the columns Item, What drives the cost (for example per person or a flat fee), and Amount. Fill in Amount only from figures I gave; otherwise write "to quote". Include a contingency line, and show whether the known costs fit the budget.
3. Run of show: a timed schedule for the day, from setup to cleanup, with who is responsible for each slot.
4. Easy to forget: venue accessibility, dietary needs and alcohol-free options, timing that works for remote or caregiving attendees, possible clashes with public or religious holidays (flag them to check, do not assume), photo consent, and a plan for illness or bad weather.
5. Open questions: decisions I still need to make, most urgent first.

Keep it practical and scannable: checklists and tables, not paragraphs of advice, with each checklist item on one line.

Do not invent prices, suppliers, venues or availability. If the date or budget is not set yet, use relative dates such as "event minus 6 weeks" and say so at the top. Anything that may need approval, such as alcohol, travel or gifts, should be flagged for me to check with whoever approves it.