George C. Thomas states the following on "Red-Letter Day" in his "Roses for All American Climates", New York 1924:
"RED-LETTER DAY. A. Dickson 1914. Hardy
Glowing scarlet-crimson - very brilliant and intense color; bud long and pointed; open flower, loose, few petals; good size and color; no fragrance. Foliage seldom has mildew, but is susceptible to black-spot. Upright growth; stems thin but fairly strong.
A splendid bedding rose, but with little or no cutting value.
Stands equal fourth in English Rose Annual's 1923 voting-lists of roses for general garden cultivation. Very continuous bloomer _ forty blooms in Cen. Zone and forty-seven with Mr. Gersdorff on own roots, washington, D.C. (K. f K. is much the same in color, has some fragrance, and is possibly, a better grower, but Red-Letter Day has so far remained in the lead in the English voting-list.)"
The breeding date of 1914 poses a problem re the parentage of American Pillar (1902).