"fulfilling day" is correct and usable in written English.
You can use it to describe a day that was satisfying or interesting. For example, "Today was an incredibly fulfilling day. I learned a lot and had fun with friends."
A fitting end to a varied and fulfilling day.
Cyra, it was a very fulfilling day… I loved it.
Still, Ms. Grenrock Woods said, it was a more fulfilling day job than some role in a Hollywood sitcom.
He looked weary but thrilled and called being with so many familiar faces the best way to cap a long, fulfilling day.
When you're writing about our winter products, think of the warm embrace of flannel after a long but fulfilling day on the ski slopes.
And every night, after the public leaves, can feel like a covert but elegant dinner party, with candles and thoughtfully prepared food, conversation flowing under the dome as urban life zooms by, the coda to an exhausting but fulfilling day.
How could I create a fulfilling day-to-day life now that my kids were leaving home?
Length of hospital stay (LOS) was recorded as actual time to home discharge once the home discharge criteria were fulfilled (day 0 = the day of operation).
For others, abusing the privilege of playing online games at work could start a pattern of procrastination or a recurrent struggle to concentrate and fulfill day-to-day responsibilities.
His wish to die fighting and become a martyr — and the honor it would bring in his community — was fulfilled Saturday morning at 7 30, though the missile struck him not while he was in active combat, but while talking on a cellphone that Israeli intelligence might have used to track his whereabouts.
This obligation wasn't fulfilled Sunday when the chatty "Questions for Bruce Ratner" in The New York Times Magazine failed to mention that the real estate developer and the parent company of this newspaper are partners in the construction of the The Times's new headquarters in Manhattan.
