Roman numerals for years are not so much harder to read than those for single digit numbers because they don't change very often. MMXXIII and MMXXIV are about a

Roman numerals for years are not so much harder to read than those for single digit numbers because they don't change very often. MMXXIII and MMXXIV are about as easy to understand as III and IV - you've already had three years to learn that we're doing MMXX prefixes now.