Configure working calendars

A working calendar tells Onplana which days count as working days and how many hours a working day holds. Schedule math then respects reality: a five-day task that starts Thursday finishes the following Wednesday, not on Monday, and a public holiday in the middle pushes it one more day.

Create a calendar

1. Open Organization Settings, go to the Configuration tab, then the Calendars section.

2. Select New Calendar, or start from one of the one-click templates on the empty state: Standard Mon–Fri (8 hours, 5 days), Mon–Sat, or 7-Day Week.

3. Name the calendar, toggle the Working Days chips, and set Hours / day (the default is 8).

4. Optionally tick Set as default calendar. An organization has exactly one default; setting a new default clears the old one.

5. Select Create Calendar.

You can keep several calendars side by side, for example a Monday-Friday calendar for one region and a Sunday-Thursday calendar for another.

Import public holidays

Expand a calendar and choose the holiday import:

1. Pick a country and year. Presets are built in for the United States, United Kingdom, Canada, Australia, Germany, France, Ireland, India, Japan, Netherlands, New Zealand, and Singapore.

2. Review the generated list. Dates already on the calendar are detected and skipped, so re-importing a year is safe.

3. Confirm the import. Each holiday lands as a non-working exception with its name.

Add one-off exceptions

Add Exception handles dates the presets cannot know: a company offsite, a regional holiday, or the inverse, a normally non-working day that becomes a working one. An exception is a date, a working or non-working flag, an optional name, and optionally a reduced hours value for half days.

Where calendars take effect

• Project scheduling. Each project can pick its calendar in the Edit Project form (the Working Calendar field); projects without one use the org default. Gantt scheduling and resource leveling then count durations in working days, skipping weekends and holidays.
• Timesheets. The weekly timesheet grid shades non-working days and labels holidays by name, and a calendar picker appears on the Timesheet page when more than one calendar exists.
• Capacity views, which sit alongside the timesheet, honor the selected calendar when rendering the week; see Plan team capacity.

Tip

Create the calendar and import holidays before scheduling work for a new region. Recalculated dates are most disruptive after a plan has been communicated.

FAQs

Can I delete a calendar that projects are using? No. Deletion is blocked while any project is assigned to the calendar; reassign those projects first. The card shows how many projects use each calendar.

Do calendars change existing task dates by themselves? No. Calendars are consulted when schedules are calculated, for example by Gantt scheduling and resource leveling. Dates you typed by hand stay where you put them.

Who can manage calendars? Owners, Admins, and Portfolio Managers. Everyone benefits from them read-only through scheduling and the timesheet views.