> ## Documentation Index
> Fetch the complete documentation index at: https://learn.nextedy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Calendars

> Nextedy GANTT working calendars control how non-working days, holidays, and per-user schedules affect task scheduling and resource capacity calculations.

export const LastReviewed = ({date}) => {
  if (!date) return null;
  const formatted = new Date(`${date}T00:00:00Z`).toLocaleDateString("en-US", {
    year: "numeric",
    month: "long",
    day: "numeric",
    timeZone: "UTC"
  });
  return <p className="mt-10 text-sm text-gray-400 dark:text-zinc-500 not-prose">
      Last reviewed on {formatted}
    </p>;
};

<Columns cols={3}>
  <Card title="Load Holidays and Non-Working Days" icon="file" href="/gantt/guides/calendars/load-holidays">
    Load global non-working days from the Polarion working calendar into the Gantt chart.
  </Card>

  <Card title="Load User Calendars" icon="file" href="/gantt/guides/calendars/user-calendars">
    Enable per-user working calendars to reflect individual schedules, vacations, and custom working hours.
  </Card>

  <Card title="Set Up Work Item Calendars" icon="file" href="/gantt/guides/calendars/work-item-calendar">
    Use dedicated Polarion work items to define calendars with Time Off, Time On, and Tweak entries.
  </Card>

  <Card title="Import Calendars from CSV" icon="file" href="/gantt/guides/calendars/csv-calendar-import">
    Import working calendar definitions from CSV files for large installations or external schedule sources.
  </Card>

  <Card title="Use Calendars from Another Project" icon="file" href="/gantt/guides/calendars/cross-project-calendar">
    Reference a centralized calendar project from multiple Polarion projects for consistent scheduling.
  </Card>

  <Card title="Customize Working Hours per Resource" icon="file" href="/gantt/guides/calendars/working-hours-per-resource">
    Define different working hours for individual resources to match part-time or shift schedules.
  </Card>

  <Card title="Configure Capacity Modifier Fields" icon="file" href="/gantt/guides/calendars/capacity-modifier-fields">
    Apply capacity modifiers to adjust effective resource availability using custom fields.
  </Card>
</Columns>

<Tip title="Calendar Configuration Order">
  Working calendar settings are interdependent. First enable **Use Working Calendar**, which reveals **Load User Calendars**, which in turn reveals **Load Team Assignments**. Configure them in this order to progressively add calendar detail to your Gantt chart.
</Tip>

<LastReviewed date="2026-07-02" />