Repository: spatie/opening-hours (php)
Issue: Unable to createFromStructureData after using `asStructuredData` on OpeningHours model
I'm trying to store `OpeningHours` in database as array and trying to do it like that:

```php
    $timetable = OpeningHours::create([
        'monday'     => ['09:00-12:00', '13:00-18:00'],
        'tuesday'    => ['09:00-12:00', '13:00-18:00'],
        'wednesday'  => ['09:00-12:00'],
        'thursday'   => ['09:00-12:00', '13:00-18:00'],
        'friday'     => ['09:00-12:00', '13:00-20:00'],
        'saturday'   => ['09:00-12:00', '13:00-16:00'],
        'sunday'     => [],
        'exceptions' => [
            '2016-11-11' => ['09:00-12:00'],
            '2016-12-25' => [],
            '01-01'      => [],                // Recurring on each 1st of January
            '12-25'      => ['09:00-12:00'],   // Recurring on each 25th of December
        ],
    ]);

    $array = $timetable->asStructuredData();
    $newOpeningHours = OpeningHours::createFromStructuredData($array);
```

But i'm getting an error: `Invalid openingHoursSpecification item at index 13: Invalid validFrom date`

How can I make it working?
Pull request description: Allow date without year in validFrom/validTo structured data
Fix #252

Patch:
diff --git a/src/OpeningHoursSpecificationParser.php b/src/OpeningHoursSpecificationParser.php
index fabd81c..b8c59d8 100644
--- a/src/OpeningHoursSpecificationParser.php
+++ b/src/OpeningHoursSpecificationParser.php
@@ -122,11 +122,11 @@ final class OpeningHoursSpecificationParser
         mixed $opens,
         mixed $closes,
     ): void {
-        if (! preg_match('/^\d{4}-\d{2}-\d{2}$/', $validFrom)) {
+        if (! preg_match('/^(?:\d{4}-)?\d{2}-\d{2}$/', $validFrom)) {
             throw new InvalidOpeningHoursSpecification('Invalid validFrom date');
         }
 
-        if (! preg_match('/^\d{4}-\d{2}-\d{2}$/', $validThrough)) {
+        if (! preg_match('/^(?:\d{4}-)?\d{2}-\d{2}$/', $validThrough)) {
             throw new InvalidOpeningHoursSpecification('Invalid validThrough date');
         }
 


Test patch:
diff --git a/tests/OpeningHoursSpecificationParserTest.php b/tests/OpeningHoursSpecificationParserTest.php
index 703a806..5c2434d 100644
--- a/tests/OpeningHoursSpecificationParserTest.php
+++ b/tests/OpeningHoursSpecificationParserTest.php
@@ -188,6 +188,222 @@ class OpeningHoursSpecificationParserTest extends TestCase
         $this->assertSame('', (string) $openingHours->forDay(Day::MONDAY));
     }
 
+    public function testCreateFromPreviousExport(): void
+    {
+        $timetable = OpeningHours::create([
+            'monday' => ['09:00-12:00', '13:00-18:00'],
+            'tuesday' => ['09:00-12:00', '13:00-18:00'],
+            'wednesday' => ['09:00-12:00'],
+            'thursday' => ['09:00-12:00', '13:00-18:00'],
+            'friday' => ['09:00-12:00', '13:00-20:00'],
+            'saturday' => ['09:00-12:00', '13:00-16:00'],
+            'sunday' => [],
+            'exceptions' => [
+                '2016-11-11' => ['09:00-12:00'],
+                '2016-12-25' => [],
+                '01-01' => [],                // Recurring on each 1st of January
+                '12-25' => ['09:00-12:00'],   // Recurring on each 25th of December
+            ],
+        ]);
+
+        $array = $timetable->asStructuredData();
+        self::assertSame([
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Monday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Monday',
+                'opens' => '13:00',
+                'closes' => '18:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Tuesday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Tuesday',
+                'opens' => '13:00',
+                'closes' => '18:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Wednesday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Thursday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Thursday',
+                'opens' => '13:00',
+                'closes' => '18:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Friday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Friday',
+                'opens' => '13:00',
+                'closes' => '20:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Saturday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Saturday',
+                'opens' => '13:00',
+                'closes' => '16:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'opens' => '09:00',
+                'closes' => '12:00',
+                'validFrom' => '2016-11-11',
+                'validThrough' => '2016-11-11',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'opens' => '00:00',
+                'closes' => '00:00',
+                'validFrom' => '2016-12-25',
+                'validThrough' => '2016-12-25',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'opens' => '00:00',
+                'closes' => '00:00',
+                'validFrom' => '01-01',
+                'validThrough' => '01-01',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'opens' => '09:00',
+                'closes' => '12:00',
+                'validFrom' => '12-25',
+                'validThrough' => '12-25',
+            ],
+        ], $array);
+
+        $newOpeningHours = OpeningHours::createFromStructuredData($array);
+
+        self::assertSame([
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Monday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Monday',
+                'opens' => '13:00',
+                'closes' => '18:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Tuesday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Tuesday',
+                'opens' => '13:00',
+                'closes' => '18:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Wednesday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Thursday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Thursday',
+                'opens' => '13:00',
+                'closes' => '18:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Friday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Friday',
+                'opens' => '13:00',
+                'closes' => '20:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Saturday',
+                'opens' => '09:00',
+                'closes' => '12:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'dayOfWeek' => 'Saturday',
+                'opens' => '13:00',
+                'closes' => '16:00',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'opens' => '09:00',
+                'closes' => '12:00',
+                'validFrom' => '2016-11-11',
+                'validThrough' => '2016-11-11',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'opens' => '00:00',
+                'closes' => '00:00',
+                'validFrom' => '2016-12-25',
+                'validThrough' => '2016-12-25',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'opens' => '00:00',
+                'closes' => '00:00',
+                'validFrom' => '01-01',
+                'validThrough' => '01-01',
+            ],
+            [
+                '@type' => 'OpeningHoursSpecification',
+                'opens' => '09:00',
+                'closes' => '12:00',
+                'validFrom' => '12-25',
+                'validThrough' => '12-25',
+            ],
+        ], $newOpeningHours->asStructuredData());
+    }
+
     public function testInvalidJson(): void
     {
         self::expectExceptionObject(new InvalidOpeningHoursSpecification(