Decimals proceed in order of refinement to smaller increments. Years are long, months are collections of days, and days are collections of hours, and so forth.

Decimals proceed in order of refinement to smaller increments. Years are long, months are collections of days, and days are collections of hours, and so forth. By that logic, all formatted dates should follow a progression of precision. This is, in fact, a standard: https://en.wikipedia.org/wiki/ISO_8601 https://en.wikipedia.org/wiki/ISO_8601