To further effectively promote expression of a clock gene and a hyaluronic acid synthase gene in skin. A composition comprising one kind or two kinds selected from lavender oil and eucalyptus oil, and an alkylene oxide derivative represented by general formula (I) is applied onto skin: R1O-[(AO)m(EO)n]-R2 (I) (wherein, AO represents an oxyalkylene group having 3-4 carbon atoms； EO represents an oxyethylene group； m and n independently represent an average number of moles of the oxyalkylene group having 3-4 carbon atoms added and the oxyethylene group added, respectively, and satisfy expressions: 1 ≤ m ≤ 70 and 1 ≤ n ≤ 70, wherein a ratio of the oxyethylene group to a total of the oxyalkylene group and the oxyethylene group is 20-80 mass%. The oxyalkylene group and the oxyethylene group may be added in a block form or random form. R1 and R2 may be the same or different, and independently represent a hydrocarbon group having 1-4 carbon atoms or a hydrogen atom, wherein a ratio of number of hydrogen atoms to number of hydrocarbon groups in R1 and R2 is 0.15 or less).
