U+3358 "㍘" Ideographic Telegraph Symbol for Hour Zero Unicode Character

U+3358 "㍘" Ideographic Telegraph Symbol for Hour Zero is a legacy symbol from the Japanese telegraph system used in the early 20th century to represent the hour 0 in a compact, standardized format for telegrams. It belongs to the CJK Compatibility block, which includes similar symbols for hours 0 through 23, each composed of the kanji for "hour" (時) combined with a numeric component. Specifically, "㍘" uses the character for zero (零) alongside the hour radical, allowing it to be easily transmitted and decoded in telegraphic communications. While it is rarely used in modern digital text, it remains a preserved artifact of historical encoding practices and is supported in Unicode for compatibility with older data.