I released Zero Hour on September 12, 1997. The name came from a song by Elvis Costello. The design used broad, boxlike letters intended to evoke a technological, futuristic look. It worked well as a display face, though I did not develop light or heavy weights, which limited its versatility for designers.
On July 20, 2021, I updated the typeface. I improved support for fractions, corrected quotation marks that had been reversed, and removed obsolete characters.
Zero Hour was initially free for commercial use. In April 2024, I released it into the public domain.