"well day" is not a correct phrase in written English
Instead, you could use something like "Have a great day" or "Wishing you a wonderful day." Example: I hope you have a great day!
Excellent control was defined in the trial 10 as more than 50% "well days" in the entire pollen season, whereby a "well day" was defined as a day on which a patient did not require any symptomatic medications and had a symptom score no higher than 2 (symptom score is on a scale from 0 to 18; a higher score indicates higher severity).
16 In order to be able to utilize data relating to the proportion of well days experienced by children in the clinical trial, we applied utilities for a "well day" and "non-well day" as previously explained, rather than applying available EQ-5D values.
"I've been putting the ball really, really well," Day said.
"He puts things together very well, day by day, moment by moment.
"It's my favorite song and I wanted my friends and all the internet to all hear it and enjoy it as well," Day told the Times.
Then she added, "I have not lived a well day since my surgery — not one — and this is a difficult truth to bear.
