Week Count Settings

The Week Calculation setting controls how week numbers are calculated in NotePlan. This affects week numbers in the calendar view and weekly note filenames.

The Three Options

  1. ISO (Legacy)
    • Original NotePlan behavior
    • Uses ISO 8601 with a configurable first day of week
    • May differ from system calendars when using a non-Monday first day
  2. System
    • Uses your device's locale calendar
    • Matches Apple Calendar week numbers
    • Respects your "First day of week" preference
  3. ISO (Standard)
    • Pure ISO 8601 standard
    • If your first day of week is not Monday, NotePlan corrects the week number automatically
    • Uses the Thursday rule (week 1 contains the first Thursday of the year)

How to Change the Setting

On iOS:

  1. Open NotePlan
  2. Tap on "Settings" in the left sidebar
  3. Tap "Week Calculation"
  4. Select your preferred option (a checkmark indicates the current selection)
  5. The setting saves automatically

On macOS:

  1. Open NotePlan
  2. Go to NotePlan > Preferences (or press Cmd + ,)
  3. Click the "Calendars" tab
  4. Use the "Week Calculation" popup menu
  5. Select your preferred option

Important Notes

  • Changing this setting may affect existing weekly note filenames if they were created with a different calculation method
  • After changing the setting, you may see a "Migrate Weekly Notes" option to rename existing weekly notes to match the new calculation
  • The setting syncs across your devices via iCloud (restart NotePlan if you don't see the change)
  • Week numbers in the calendar view update immediately after changing the setting

When to Use Each Option

  • Use ISO (Legacy) if you want to maintain compatibility with existing weekly notes created in older versions of NotePlan
  • Use System if you want week numbers to match Apple Calendar
  • Use ISO (Standard) if you need strict ISO 8601 compliance for international standards or business use, matches Google Calendar