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seasonal

seasonal /ˈsiːzn̩əl/ adjective
seasonal
/ˈsiːzn̩əl/
adjective
Britannica Dictionary definition of SEASONAL
: happening or needed during a particular time of the year
: normal for a certain time of year

— seasonality

/ˌsiːzəˈnæləti/ noun, technical [noncount]

— seasonally

adverb