The lead time for a company anniversary depends on the scale and complexity. For a small anniversary (20-50 people), you need at least 3 to 4 months. For a mid-sized to large anniversary, we recommend 6 to 9 months of preparation.
For a large anniversary (100 years, multiple audiences, full production), 9 to 12 months is no unnecessary luxury. Popular venues and entertainment are often booked up months in advance.
Starting early gives you more creative freedom, certainty in planning and better availability of venues and suppliers.