add getInRange function

README.md

@@ -68,6 +68,16 @@ use Spatie\Holidays\Holidays;
 $holidays = Holidays::for(country: 'be', year: 2024))->get();
 ```
 
+### Getting holidays between two dates
+
+You can also get all holidays between two dates (inclusive).
+
+```php
+use Spatie\Holidays\Holidays;
+
+$holidays = Holidays::for('be')->getInRange('2023-06-01', '2024-05-31');
+```
+
 ### Determining if a date is a holiday 
 
 If you need to see if a date is a holiday, you can use the `isHoliday` method.

src/Countries/Country.php

@@ -35,6 +35,41 @@ public function get(int $year): array
         return $allHolidays;
     }
 
+    /** @return array<string, string>  date => name */
+    public function getInRange(?CarbonImmutable $from, ?CarbonImmutable $to): array
+    {
+        $from ??= CarbonImmutable::now()->startOfYear();
+        $to ??= CarbonImmutable::now()->endOfYear();
+
+        $this->ensureYearCanBeCalculated($from->year);
+        $this->ensureYearCanBeCalculated($to->year);
+
+        $allHolidays = [];
+
+        for ($year = $from->year; $year <= $to->year; $year++) {
+            $yearHolidays = $this->get($year);
+            /**
+             * @var string $name
+             * @var CarbonImmutable $date
+             */
+            foreach ($yearHolidays as $name => $date) {
+                if ($date->between($from, $to)) {
+                    $allHolidays[] = ['date' => $date, 'name' => $name];
+                }
+            }
+        }
+
+        usort($allHolidays, static fn (array $a, array $b) => $a['date'] <=> $b['date']);
+
+        $mappedHolidays = [];
+        /** @var array{date: CarbonImmutable, name: string} $holiday */
+        foreach ($allHolidays as $holiday) {
+            $mappedHolidays[$holiday['date']->toDateString()] = $holiday['name'];
+        }
+
+        return $mappedHolidays;
+    }
+
     public static function make(): static
     {
         return new static(...func_get_args());

src/Holidays.php

@@ -14,6 +14,8 @@ class Holidays
     protected function __construct(
         protected Country $country,
         protected int $year,
+        protected ?CarbonImmutable $from = null,
+        protected ?CarbonImmutable $to = null
     ) {
     }
 
@@ -39,6 +41,43 @@ public function get(Country|string|null $country = null, ?int $year = null): arr
             ->toArray();
     }
 
+    /**
+     * getInRange method allows you to pick holidays in a range of dates,
+     *   - dates are inclusive.
+     *   - dates are swappable, lower date could be passed as second argument.
+     *   - dates could be a CarbonInterface or a string.
+     *   - acceptable strings formats are 'Y-m-d' or 'Y-m' or 'Y'
+     *   - if passed string is 'Y-m' or 'Y' it will be converted to first(from) / last{to} day of the month(from) / year(to)
+     * E.g. to retrieve all holidays in between
+     *    - 2020-01-01 and 2024-12-31, you could use: getInRange('2020-01-01', '2024-12-31'), getInRange('2020-01', '2024-12') or getInRange('2020', '2024')
+     *    - 2024-06-01 and 2025-05-30, you could use: getInRange('2024-06-01', '2025-05-30'), getInRange('2024-06', '2025-05')
+     * @return array<string, string> date => name
+     */
+    public function getInRange(CarbonInterface|string $from, CarbonInterface|string $to): array
+    {
+        if (! $from instanceof CarbonImmutable) {
+            $from = match (strlen($from)) {
+                4 => CarbonImmutable::parse($from . '-01-01'),
+                7 => CarbonImmutable::parse($from . '-01'),
+                default => CarbonImmutable::parse($from),
+            };
+        }
+
+        if (! $to instanceof CarbonImmutable) {
+            $to = match (strlen($to)) {
+                4 => CarbonImmutable::parse($to . '-12-31'),
+                7 => CarbonImmutable::parse($to)->endOfMonth(),
+                default => CarbonImmutable::parse($to),
+            };
+        }
+
+        if ($from->gt($to)) {
+            [$from, $to] = [$to, $from];
+        }
+
+        return $this->country->getInRange($from, $to);
+    }
+
     public function isHoliday(CarbonInterface|string $date, Country|string|null $country = null): bool
     {
         if (! $date instanceof CarbonImmutable) {

tests/HolidaysTest.php

@@ -83,3 +83,19 @@
     $result = Holidays::for('be')->getName(CarbonImmutable::parse('2024-01-02'));
     expect($result)->toBeNull();
 });
+
+it('can get all holidays between two dates', function (string|CarbonImmutable $from, string|CarbonImmutable $to, int $expectedCount, string $firstName, string $lastName) {
+    $holidays = Holidays::for('be')->getInRange($from, $to);
+
+    expect($holidays)->toBeArray();
+    expect($holidays)->toHaveCount($expectedCount);
+    expect(reset($holidays))->toBe($firstName);
+    expect(end($holidays))->toBe($lastName);
+})->with([
+    ['2020', '2024', 50, 'Nieuwjaar', 'Kerstmis'],
+    ['2024-06', '2025-05', 9, 'Nationale Feestdag', 'OLH Hemelvaart'],
+    ['2023-06-01', '2024-05-30', 10, 'Nationale Feestdag', 'Pinkstermaandag'],
+    ['2024-05-30', '2023-06-01', 10, 'Nationale Feestdag', 'Pinkstermaandag'],
+    [CarbonImmutable::parse('2023-06-01'), CarbonImmutable::parse('2024-05-30'), 10, 'Nationale Feestdag', 'Pinkstermaandag'],
+    [CarbonImmutable::parse('2023-06-01'), '2024-05', 10, 'Nationale Feestdag', 'Pinkstermaandag'],
+]);