[gmuslera]

Moon orbit (from there comes the original week and month) doesn't have to be proportional to Earths rotation (day), nor any of them with Earth's orbit around the sun (year and seasons). Those divisions had some original real life meanings (it was easier to track time by moon phases, and it was important to have a clue on where a season will start for agriculture) but being more accurate meant that some of those old meanings became more decorative or convention than something necessary. And things are a bit more complicated for agriculture than just the start of the seasons anyway (plants may be flowering earlier due to climate change)

Things would had been easier if our world behaved like i.e. Stardew Valley year (4 months=seasons, 28 days/4 weeks each month, no leap years, and the start of each season mean an abrupt change of conditions)