First (?) shown in PLINC’s Alphabet Yearbook 1969, alongside Cenotaph, a skewed dimensional derivative. One Line (1971) shows 8 variants of Calendar; 2 flat ones (Black and Outline) and 6 dimensional ones (B–H). Some sources credit Ed Benguiat with the design. [Thees, Oka] Uncredited in Photo-Lettering’s One Line catalog (1971).