diff --git a/config/packages/doctrine.yaml b/config/packages/doctrine.yaml
index 7fef3c5..ca2f098 100644
--- a/config/packages/doctrine.yaml
+++ b/config/packages/doctrine.yaml
@@ -7,6 +7,8 @@ doctrine:
         url: '%env(resolve:DATABASE_URL)%'
         logging: true
         profiling: true
+        types:
+            datetime: App\Doctrine\CarbonDateTimeType
 
     orm:
         auto_generate_proxy_classes: '%kernel.debug%'
diff --git a/src/Doctrine/CarbonDateTimeType.php b/src/Doctrine/CarbonDateTimeType.php
new file mode 100644
index 0000000..989332c
--- /dev/null
+++ b/src/Doctrine/CarbonDateTimeType.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Doctrine;
+
+use Carbon\Carbon;
+use Doctrine\DBAL\Platforms\AbstractPlatform;
+use Doctrine\DBAL\Types\ConversionException;
+use Doctrine\DBAL\Types\DateTimeType;
+
+class CarbonDateTimeType extends DateTimeType
+{
+    public function convertToDatabaseValue($value, AbstractPlatform $platform)
+    {
+        if ($value instanceof \DateTimeInterface) {
+            $value = Carbon::instance($value);
+        }
+
+        if ($value instanceof Carbon) {
+            $value = $value->tz('UTC');
+        }
+
+        return parent::convertToDatabaseValue($value, $platform);
+    }
+
+    public function convertToPHPValue($value, AbstractPlatform $platform)
+    {
+        if (null === $value || $value instanceof Carbon) {
+            return $value;
+        }
+
+        $converted = Carbon::createFromFormat(
+            $platform->getDateTimeFormatString(),
+            $value,
+            'UTC'
+        );
+
+        if (!$converted) {
+            throw ConversionException::conversionFailedFormat(
+                $value,
+                $this->getName(),
+                $platform->getDateTimeFormatString()
+            );
+        }
+
+        return $converted;
+    }
+}
diff --git a/src/Provider/Database/GenericScheduleRepository.php b/src/Provider/Database/GenericScheduleRepository.php
index cc43690..9d09acc 100644
--- a/src/Provider/Database/GenericScheduleRepository.php
+++ b/src/Provider/Database/GenericScheduleRepository.php
@@ -20,7 +20,7 @@ class GenericScheduleRepository extends DatabaseRepository implements ScheduleRe
 {
     public function getDeparturesForStop(
         Stop $stop,
-        \DateTime $from,
+        Carbon $from,
         int $count = ScheduleRepository::DEFAULT_DEPARTURES_COUNT
     ): Collection {
         $query = $this->em
diff --git a/src/Provider/ScheduleRepository.php b/src/Provider/ScheduleRepository.php
index 0e60468..554d9e5 100644
--- a/src/Provider/ScheduleRepository.php
+++ b/src/Provider/ScheduleRepository.php
@@ -3,6 +3,7 @@
 namespace App\Provider;
 
 use App\Model\Stop;
+use Carbon\Carbon;
 use Tightenco\Collect\Support\Collection;
 
 interface ScheduleRepository
@@ -11,7 +12,7 @@ interface ScheduleRepository
 
     public function getDeparturesForStop(
         Stop $stop,
-        \DateTime $from,
+        Carbon $from,
         int $count = ScheduleRepository::DEFAULT_DEPARTURES_COUNT
     ): Collection;
 }
diff --git a/src/Provider/ZtmGdansk/ZtmGdanskDepartureRepository.php b/src/Provider/ZtmGdansk/ZtmGdanskDepartureRepository.php
index 9f5530b..7884899 100644
--- a/src/Provider/ZtmGdansk/ZtmGdanskDepartureRepository.php
+++ b/src/Provider/ZtmGdansk/ZtmGdanskDepartureRepository.php
@@ -42,7 +42,7 @@ class ZtmGdanskDepartureRepository implements DepartureRepository
     public function getForStop(Stop $stop): Collection
     {
         $real      = $this->getRealDepartures($stop);
-        $now       = Carbon::now();
+        $now       = Carbon::now('UTC');
         $first     = $real->map(t\getter('scheduled'))->min() ?? $now;
         $scheduled = $this->getScheduledDepartures($stop, $first < $now ? $now : $first);
 
@@ -60,7 +60,7 @@ class ZtmGdanskDepartureRepository implements DepartureRepository
         $lines = $this->lines->getManyById($lines)->keyBy(t\property('id'));
 
         return collect($estimates)->map(function ($delay) use ($stop, $lines) {
-            $scheduled = (new Carbon($delay['theoreticalTime'], 'Europe/Warsaw'));
+            $scheduled = (new Carbon($delay['theoreticalTime'], 'Europe/Warsaw'))->tz('UTC');
             $estimated = (clone $scheduled)->addSeconds($delay['delayInSeconds']);
 
             return Departure::createFromArray([
@@ -85,7 +85,7 @@ class ZtmGdanskDepartureRepository implements DepartureRepository
     private function pair(Collection $schedule, Collection $real)
     {
         $key = function (Departure $departure) {
-            return sprintf("%s::%s", $departure->getScheduled()->format("H:i"), $departure->getLine()->getSymbol());
+            return sprintf("%s::%s", $departure->getLine()->getSymbol(), $departure->getScheduled()->format("H:i"));
         };
 
         $schedule = $schedule->keyBy($key)->all();