The Week & Month Calendar designed by Karl Palmen in 2018 is a variant of the Symmetry454 Calendar with ISO week date rules in force and no day of month number. It uses the traditional month names unaltered but instead of a day of month number, has a week of the month name, which is provided as either a Roman or Greek letter (name), i.e. A through E or Alpha through Epsilon. While the natural order of date elements in English is kept with the smallest one first, e.g. Saturday Epsilon November 2018, numerical dates may use ISO-like conventions, e.g. 2018-11-5-6.
| Week | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| Mon | Tue | Wed | Thu | Fri | Sat | Sun | |
| Alpha | 01 | 02 | 03 | 04 | 05 | 06 | 07 |
| Beta | 08 | 09 | 10 | 11 | 12 | 13 | 14 |
| Gamma | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| Delta | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| Epsilon | 29 | 30 | 31 | 32 | 33 | 34 | 35 |
The day of month numbers may be omitted from the layout and do not form part of any calendar date. The Epsilon week only occurs in 5-week month.