Add public holidays for Ghana

src/Countries/Ghana.php

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+<?php
+
+namespace Spatie\Holidays\Countries;
+
+use Carbon\CarbonImmutable;
+
+class Ghana extends Country
+{
+
+    public function countryCode(): string
+    {
+        return 'gh';
+    }
+
+    protected function allHolidays(int $year): array
+    {
+        return array_merge([
+            'New Year\'s Day' => '01-01',
+            'Constitution Day' => '01-07',
+            'Independence Day' => '03-06',
+            'May Day' => '05-01',
+            'Founder\'s Day' => '08-04',
+            'Kwame Nkrumah Memorial Day' => '09-21',
+            'Christmas Day' => '12-25',
+            'Boxing Day' => '12-26',
+        ], $this->variableHolidays($year));
+    }
+
+    /** @return array<string, CarbonImmutable> */
+    protected function variableHolidays(int $year): array
+    {
+        $easter = $this->easter($year);
+
+        return [
+            'Good Friday' => $easter->subDays(2),
+            'Easter Monday' => $easter->addDay(),
+        ];
+    }
+}

tests/.pest/snapshots/Countries/GhanaTest/it_can_calculate_Ghana_date_based_regional_holidays.snap

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+[
+    {
+        "name": "New Year's Day",
+        "date": "2024-01-01"
+    },
+    {
+        "name": "Constitution Day",
+        "date": "2024-01-07"
+    },
+    {
+        "name": "Independence Day",
+        "date": "2024-03-06"
+    },
+    {
+        "name": "Good Friday",
+        "date": "2024-03-29"
+    },
+    {
+        "name": "Easter Monday",
+        "date": "2024-04-01"
+    },
+    {
+        "name": "May Day",
+        "date": "2024-05-01"
+    },
+    {
+        "name": "Founder's Day",
+        "date": "2024-08-04"
+    },
+    {
+        "name": "Kwame Nkrumah Memorial Day",
+        "date": "2024-09-21"
+    },
+    {
+        "name": "Christmas Day",
+        "date": "2024-12-25"
+    },
+    {
+        "name": "Boxing Day",
+        "date": "2024-12-26"
+    }
+]

tests/.pest/snapshots/Countries/GhanaTest/it_can_calculate_Ghana_easter_based_region_holidays.snap

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+[
+    {
+        "name": "New Year's Day",
+        "date": "2024-01-01"
+    },
+    {
+        "name": "Constitution Day",
+        "date": "2024-01-07"
+    },
+    {
+        "name": "Independence Day",
+        "date": "2024-03-06"
+    },
+    {
+        "name": "Good Friday",
+        "date": "2024-03-29"
+    },
+    {
+        "name": "Easter Monday",
+        "date": "2024-04-01"
+    },
+    {
+        "name": "May Day",
+        "date": "2024-05-01"
+    },
+    {
+        "name": "Founder's Day",
+        "date": "2024-08-04"
+    },
+    {
+        "name": "Kwame Nkrumah Memorial Day",
+        "date": "2024-09-21"
+    },
+    {
+        "name": "Christmas Day",
+        "date": "2024-12-25"
+    },
+    {
+        "name": "Boxing Day",
+        "date": "2024-12-26"
+    }
+]

tests/.pest/snapshots/Countries/GhanaTest/it_can_calculate_Ghana_holidays.snap

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+[
+    {
+        "name": "New Year's Day",
+        "date": "2024-01-01"
+    },
+    {
+        "name": "Constitution Day",
+        "date": "2024-01-07"
+    },
+    {
+        "name": "Independence Day",
+        "date": "2024-03-06"
+    },
+    {
+        "name": "Good Friday",
+        "date": "2024-03-29"
+    },
+    {
+        "name": "Easter Monday",
+        "date": "2024-04-01"
+    },
+    {
+        "name": "May Day",
+        "date": "2024-05-01"
+    },
+    {
+        "name": "Founder's Day",
+        "date": "2024-08-04"
+    },
+    {
+        "name": "Kwame Nkrumah Memorial Day",
+        "date": "2024-09-21"
+    },
+    {
+        "name": "Christmas Day",
+        "date": "2024-12-25"
+    },
+    {
+        "name": "Boxing Day",
+        "date": "2024-12-26"
+    }
+]

tests/Countries/GhanaTest.php

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+<?php
+
+namespace Spatie\Holidays\Tests\Countries;
+
+use Carbon\CarbonImmutable;
+use Spatie\Holidays\Countries\France;
+use Spatie\Holidays\Holidays;
+
+it('can calculate Ghana holidays', function () {
+    CarbonImmutable::setTestNowAndTimezone('2024-01-01');
+
+    $holidays = Holidays::for(country: 'gh')->get();
+
+    expect($holidays)
+        ->toBeArray()
+        ->not()->toBeEmpty();
+
+    expect(formatDates($holidays))->toMatchSnapshot();
+});
+
+it('can calculate Ghana easter based region holidays', function () {
+    CarbonImmutable::setTestNowAndTimezone('2024-01-01');
+
+    $holidays = Holidays::for(country: 'gh')->get();
+
+    expect($holidays)
+        ->toBeArray()
+        ->not()->toBeEmpty();
+
+    expect(formatDates($holidays))->toMatchSnapshot();
+});
+
+it('can calculate Ghana date based regional holidays', function () {
+    CarbonImmutable::setTestNowAndTimezone('2024-01-01');
+
+    $holidays = Holidays::for(country: 'gh')->get();
+
+    expect($holidays)
+        ->toBeArray()
+        ->not()->toBeEmpty();
+
+    expect(formatDates($holidays))->toMatchSnapshot();
+});