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MythTapestry Docs

Calendar Setup

MythTapestry gives every world a working calendar from the moment you create it. This page explains what you get out of the box, what calendars power across your world, and how to add more when you need them.

What you get when you create a world

Section titled “What you get when you create a world”

When you finish the world creation wizard, MythTapestry automatically creates a Default Calendar for your world. It includes:

  • 365 days per year
  • Twelve named months
  • A seven-day week
  • Hours, minutes, and seconds for time of day

No leap years are included — this keeps the structure clean and easy to modify. You can start placing world events, tagging entities with dates, and writing inline date references immediately, without touching any calendar settings.

If your world doesn’t need a custom time system, you may never need to change anything here.

To modify the default calendar or swap it out entirely, go to Management > Calendars in the world sidebar.

What calendars power

Section titled “What calendars power”

Once a calendar is in place, it connects to almost everything time-related in your world:

  • Entity fields — birth dates, death dates, founding years: any temporal field on an entity reads and displays through your calendar.
  • Relationships — the “valid from” and “valid to” dates on a relationship use calendar dates to show when a connection existed.
  • World events — battles, coronations, disasters: each event is pinned to a specific date or range on the calendar timeline.
  • Writing — date mentions in your prose can be linked to the calendar, so a reference to “the 3rd of Frostmonth” stays consistent across your world.

Calendar presets

Section titled “Calendar presets”

When you create a new calendar, MythTapestry gives you three starting points:

PresetWhat you get
Gregorian12 months (January–December), 7-day weeks, full leap year rules, hours/minutes/seconds, and 5 ready-made format strings
Lunar12 lunar months (~29.5 days each) with a 4-phase moon cycle overlay and 2 format strings
CustomA blank structure — define every scale, unit, and rule yourself

Start with Gregorian or Lunar if your world’s calendar resembles either of those. Use Custom when you’re building something entirely original.

Multiple calendars

Section titled “Multiple calendars”

A world can have more than one calendar. You might have a solar calendar used by one empire and a lunar calendar used by a neighbouring culture — each with its own month names, week structure, and date formats.

Every calendar is independent. When you want to compare dates across two calendars, you can link them using a reference date: you tell MythTapestry that a specific date in Calendar A is the same moment as a specific date in Calendar B. After that, any date in either calendar can be shown in the other automatically.

Next steps

Section titled “Next steps”