do all roman clocks still write number four as IIII instead of IV

No, the notion that all Roman clocks still write the number four as IIII instead of IV is a misconception. In Roman numerals, the number four is correctly represented as IV, not IIII.

The Roman numeral system uses combinations of letters from the Latin alphabet to represent numbers:

• I for 1
• V for 5
• X for 10
• L for 50
• C for 100
• D for 500
• M for 1000

The principle behind Roman numerals involves placing symbols that represent larger values before symbols that represent smaller values, and when a smaller value precedes a larger one, it is subtracted from the larger value. Therefore, IV means 5 - 1 = 4.

Clocks that use Roman numerals, including those in the traditional Roman style, typically follow this logic and display four as IV. The misinterpretation that clocks might show four as IIII could stem from confusion or a misunderstanding of the Roman numeral system, but it is not a standard practice.