Below is a list of calendars that either
- have been proposed as candidates for a new calendar to replace the commonly used one,
- have been devised for some particular purpose (e.g., staying in sync with the Moon's phases, or for living on Mars),
- have been invented because the calendar maker felt the urge to do so or
- for some or all of these reasons.
This list also includes calendars of dubious historicity and some that are perhaps not entirely serious.
- Also see: Proposed calendars
|3–6 days per week||7 days per week||8–10 days per week|
Calendars with 7 day week plus some extrahebdomadal days (days outside of 7-day week)
Calendars with Radical DesignEdit
Calendars intended for other places than EarthEdit