Календарь Swift UI без пакетов

У меня была попытка создать Календарь в быстром пользовательском интерфейсе без пакетов и т. д. У меня он работает частично, но есть проблема, что все воскресенья 1-е, монады 2-е, вторник 3-е и т. д. Возникли проблемы с перестановкой их так, чтобы числа дат действительно выстраивались с реальными днями мира. Любые идеи, где я ошибаюсь

struct CustomCalendarView: View {
let calendar = Calendar.current
let daysOfWeek = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]
@State private var selectedDate: Date = Date()

var body: some View {
    VStack {
        HStack {
            Button(action: {
                navigateToPreviousMonth()
            }) {
                Image(systemName: "chevron.left")
                    .font(.headline)
            }
            .padding(.trailing, 8)

            Text(monthYearFormatter.string(from: selectedDate))
                .font(.title)
                .padding(.bottom, 10)

            Button(action: {
                navigateToNextMonth()
            }) {
                Image(systemName: "chevron.right")
                    .font(.headline)
            }
            .padding(.leading, 8)
        }

        HStack {
            ForEach(daysOfWeek, id: \.self) { day in
                Text(day)
                    .font(.headline)
                    .frame(maxWidth: .infinity)
            }
        }

        LazyVGrid(columns: Array(repeating: .init(.flexible()), count: 7)) {
            ForEach(1...daysInMonth(date: selectedDate), id: \.self) { day in
                Text("\(day)")
                    .font(.headline)
                    .frame(maxWidth: .infinity)
                    .padding(8)
                    .background(dayBackgroundColor(for: day))
                    .foregroundColor(dayForegroundColor(for: day))
                    .clipShape(Circle())
                    .onTapGesture {
                        selectDate(day: day)
                    }
            }
        }
    }
    .padding()
}

private func selectDate(day: Int) {
    var components = calendar.dateComponents([.year, .month, .day], from: selectedDate)
    components.day = day
    guard let updatedDate = calendar.date(from: components) else {
        return
    }
    selectedDate = updatedDate
}

private func daysInMonth(date: Date) -> Int {
    guard let range = calendar.range(of: .day, in: .month, for: date) else {
        return 0
    }
    return range.count
}

private func dayBackgroundColor(for day: Int) -> Color {
    let isCurrentMonth = calendar.isDate(selectedDate, equalTo: Date(), toGranularity: .month)
    let isSelected = calendar.isDate(selectedDate, equalTo: date(withDay: day), toGranularity: .day)
    return isCurrentMonth && isSelected ? .blue : .clear
}

private func dayForegroundColor(for day: Int) -> Color {
    let isCurrentMonth = calendar.isDate(selectedDate, equalTo: Date(), toGranularity: .month)
    let isSelected = calendar.isDate(selectedDate, equalTo: date(withDay: day), toGranularity: .day)
    return isCurrentMonth && isSelected ? .white : .primary
}

private func date(withDay day: Int) -> Date {
    var components = calendar.dateComponents([.year, .month, .day], from: selectedDate)
    components.day = day
    return calendar.date(from: components) ?? Date()
}

private var monthYearFormatter: DateFormatter = {
    let formatter = DateFormatter()
    formatter.dateFormat = "MMMM yyyy"
    return formatter
}()

private func navigateToPreviousMonth() {
    guard let previousMonth = calendar.date(byAdding: .month, value: -1, to: selectedDate) else {
        return
    }
    selectedDate = previousMonth
}

private func navigateToNextMonth() {
    guard let nextMonth = calendar.date(byAdding: .month, value: 1, to: selectedDate) else {
        return
    }
    selectedDate = nextMonth
}
}