Nicht akzeptierte einfarbige Postkarten mit anderer Bedeutung als "bei Nacht" /
Non-accepted single-color postcards with other meaning than "by night"

in Winter; Winter in; Mid Winter in; d'inverno (in Winter); in the snow; during a snowstorm; in a snowstorm; snowstorm; Tempete de niege (Snowstorm); im Schneesturm; Blizzard;

Detail of Washington Monument / beli grad (white city) / Razglednica (Postcard) / Shi fahren im Nebel (Skiing in the Fog)

in the Fog; in fog; A Foggy Day; Foggy Day; Foggy; A Foggy View; im Nebel; en una dia de niebla; Lost in the Fog; on a foggy morning; un giorno di nebbia (a foggy day); u magli (in fog)
in the Mist; in de mist; Mist; Misty; Brume Matrinale (Morning Mist); Grad Magle (City of Mist); en una dia nublado (on a cloudy day)

A Summer Day - A Fall Day - A Winter Day - A Spring Day

rainy day; a rainy day; summer in; im Regen; in de regen

by sun; sous le soleil; the sunny; sunshine; a sunny day; bei Sonnenschein; Sun Stroke

The sands of; Sick guide on desert

at morning

by day; by dag; at noon; blue sky;

The sea; heat wave; an der schönen blauen xxx (at the nice blue xxx)

Lost in the Smog; Red Sky at Night; at evening; Wiener Blut (Viennese Blood); Red lights; Detail of traffic light

Holiday Rock

bei Ebbe (at low tide)

Clean and Green

Drunk; so blau war ich (I was so drunk/blue)

Siehe Definition und positive Beispiele hier / see definition and good examples here