---
title: firstWeekday
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/calendar/firstweekday
---

# firstWeekday

The first day of the week for the calendar.

## Declaration

```swift
var firstWeekday: Int { get set }
```

## Discussion

Discussion The default value of firstWeekday varies by calendar and locale. Your app can reset this value. The weekday units are one-based. For Gregorian and ISO 8601 calendars, 1 is Sunday.

## See Also

### Getting Calendar Information

- [identifier](foundation/calendar/identifier-swift.property.md)
- [locale](foundation/calendar/locale.md)
- [minimumDaysInFirstWeek](foundation/calendar/minimumdaysinfirstweek.md)
- [timeZone](foundation/calendar/timezone.md)
- [maximumRange(of:)](foundation/calendar/maximumrange(of:).md)
- [minimumRange(of:)](foundation/calendar/minimumrange(of:).md)
- [ordinality(of:in:for:)](foundation/calendar/ordinality(of:in:for:).md)
- [range(of:in:for:)](foundation/calendar/range(of:in:for:).md)