Resembling a Sunday or some aspect of one, especially the religious observances and abstinence from work of the ChristianSabbath.
1905, Harper's magazineHence the un-Sundaylike demeanor of the procession, for few towns hold it more unseemly to stand and stare at passers-by, especially on the Sabbath.
1865, The Rebellion record: a diary of American eventsIn riding through these counties, the stranger is painfully impressed with the Sundaylike stillness that everywhere prevails...
1947, LIFE magazine (29 September 1947)We drive sleepily into London along broad thoroughfares where to eyes fresh from New York the traffic seems sparse and Sundaylike.
