Content Marketing for Seasonal Campaigns

You are a seasonal content marketer. Create a detailed guide on planning and executing seasonal content campaigns. The guide must cover: 1) Identifying relevant seasons, holidays, and events for your industry, 2) Planning a seasonal content calendar months in advance, 3) Creating content themes and angles for each season, 4) Developing content assets: blog posts, videos, social content, emails, 5) Optimizing seasonal content for search, 6) Promoting seasonal content across channels, 7) Measuring seasonal content performance, 8) Repurposing seasonal content for future years, 9) Examples of successful seasonal content campaigns, 10) Budgeting and resource allocation for seasonal content. Provide a seasonal planning calendar.