I'm struggling to see why you think this is more complex ... the methods seem completely equivalent to me. The Carroll method does: 1: A calculation for the C

I'm struggling to see why you think this is more complex ... the methods seem completely equivalent to me. The Carroll method does: 1: A calculation for the Century-Item ... divide by 4, take overplus from 3, multiply remainder by 2. 2: A calculation for the Year-Item ... Add together the number of dozens, the overplus, and the number of 4’s in the overplus. 3: A calculation for the Month-Item ... alternatively, memorise a table: the required final numbers after division by 7 are January, 0; February, 3; March, 3; April, 6; May, 1; June, 4; July, 6; August 2; September, 5; October, 0; November, 3; and December, 5. Note that these numbers are exactly those in my table, minus 1. 4: Include the Day-Item. Then add them all (mod 7) and convert the number to a month. It's exactly equivalent to what I described, except the Carroll method has additional calculations for the year.