Wiktionary
a. Not festive.
Usage examples of "unfestive".
From delicacy to her grief he laid not aside his dark and unfestive robes, but, renewing the perfumes on his raven locks, and arranging his tunic in its most becoming folds, he sought the chamber of the Neapolitan.
Our self-conscious and considerate visitors dumbly expressed amazement at their informal reception and our unfestive attire.
He pointed to the silk-draped entrance where two men stood with the snow melting on the shoulders of their insulated suits, unfestive, unsmiling, waiting.
Eve pageant and its attendant temple rituals had commenced early in the morning, and even though it was not yet noon, already Briony had begun mightily to regret letting Nynor talk her into holding these most unfestive festivities.