The 4 weeks a month calendar has the months of the Gregorian calendar, but puts exactly 4 weeks of 7 days each (or exactly 20 work days) into each of the 12 months. The excessive up to 3 days are holidays outside the week cycle. The exact placement and denomination of holidays is up to local customs.
| Month | H1 | W1 | H2 | W2 | H3 | W3 | H4 | W4 | H5 | Days |
|---|---|---|---|---|---|---|---|---|---|---|
| January | New Year's Day | 02..08 | Epiphanias | 10..16 | — | 17..23 | — | 24..30 | Candlemas | 31 |
| February | — | 01..07 | — | 08..14 | — | 15..21 | — | 22..28 | (Leap) | 28+ |
| March | Lent | 02..08 | — | 09..15 | — | 16..22 | Spring | 24..30 | Passa | 31 |
| April | — | 01..07 | Easter | 09..15 | — | 16..22 | — | 23..29 | Mother | 30 |
| May | Labor | 02..08 | Peace | 10..16 | — | 17..23 | — | 24..30 | Pentecost | 31 |
| June | Father | 02..08 | — | 09..15 | — | 16..22 | Summer | 24..30 | — | 30 |
| July | Independence | 02..08 | Revolution | 10..16 | — | 17..23 | — | 24..30 | Nature | 31 |
| August | — | 01..07 | World Peace | 09..15 | Ascension | 17..23 | Harvest | 25..31 | — | 31 |
| September | School | 02..08 | — | 09..15 | — | 16..22 | Autumn | 24..30 | — | 30 |
| October | Unity | 02.08 | Remembrance | 10..16 | — | 17..23 | — | 24..30 | Halloween | 31 |
| November | All Hallows | 02..08 | — | 09..15 | — | 16..22 | Thanksgiving | 24..30 | — | 30 |
| December | — | 01..07 | — | 08..14 | Winter | 16..22 | Christmas | 24..30 | New Year's Eve | 31 |