Fresh as a daisy Informal

Full of energy, alertness, and enthusiasm, especially after rest — feeling as if one hasn’t been tired or worn out at all.

It’s most often used to describe how quickly and completely someone has recovered, whether from sleep, illness, or exertion, rather than describing a general personality trait.

The earliest documented use is from November 1778, in “The Town and Country Magazine,” where a letter about idle coffee-house patrons describes someone arriving “fresh as a daisy” despite having “come a hundred miles yesterday.” The image likely rests on the daisy’s own daily behavior: the flower opens its petals at dawn and closes them again at dusk, appearing to rest each night and return each morning looking untouched by fatigue — behavior reflected in the very word “daisy,” which comes from Old English “dæges éage,” literally “day’s eye,” describing how the flower opens like an eye each day. Geoffrey Chaucer wrote admiringly about daisies opening and closing with the sun in his 14th-century “The Legend of Good Women,” though he used the comparison “fresh as a rose” rather than this exact phrase, meaning the daisy-specific wording came centuries after Chaucer’s fondness for the flower itself.

After a good night’s sleep, she woke up fresh as a daisy.

He ran the marathon and still looked fresh as a daisy afterward.

I felt fresh as a daisy after the vacation.

A: “How are you after the long flight?” B: “Surprisingly fresh as a daisy.”