calendar effect
type: Concept
broader: effect
preferred label: اثر سالانه @fa

seasonal effect
type: Concept
broader: effect
preferred label: اثر فصلی @fa

effect
type: Concept
broader: time series analysis
narrower: seasonal effect
narrower: calendar effect
preferred label: اثر @fa

time series analysis
type: Concept
narrower: effect
preferred label: تحلیل سری‌های زمانی @fa