Data & Analytics
(Saisonalität)Seasonality
Also known as:
Seasonal Pattern
Periodic Variation
Seasonal Component
Updated: 2/11/2026
Regularly recurring patterns in time series that repeat at fixed intervals.
Quick Summary
Seasonality describes regularly recurring patterns in time series – essential for forecasting and marketing planning.
Explanation
Modeled through Fourier terms, seasonal dummies, or STL decomposition. Multiple seasonalities require TBATS or Prophet.
Marketing Relevance
Seasonal patterns shape marketing budgets, campaign timing, and content planning.
Common Pitfalls
Confusing seasonality with trend. Ignoring calendar effects.
Origin & History
Seasonal adjustment formalized by U.S. Census Bureau (X-11, 1965). STL decomposition (Cleveland, 1990).
Comparisons & Differences
Seasonality vs. Trend
Seasonality repeats periodically; trend describes the long-term direction.