diff --git a/app/Support/Calendar/Calculator.php b/app/Support/Calendar/Calculator.php
index a26fb5ea18..b4475c7df7 100644
--- a/app/Support/Calendar/Calculator.php
+++ b/app/Support/Calendar/Calculator.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli https://github.com/tonicospinelli
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Exceptions/IntervalException.php b/app/Support/Calendar/Exceptions/IntervalException.php
index 40daccd8f6..e30621f5a1 100644
--- a/app/Support/Calendar/Exceptions/IntervalException.php
+++ b/app/Support/Calendar/Exceptions/IntervalException.php
@@ -1,9 +1,27 @@
 <?php
 
+/**
+ * Copyright (c) 2023 Antonio Spinelli https://github.com/tonicospinelli
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
 namespace FireflyIII\Support\Calendar\Exceptions;
 
 use FireflyIII\Support\Calendar\Periodicity;
-use JetBrains\PhpStorm\Pure;
 
 final class IntervalException extends \Exception
 {
@@ -12,17 +30,22 @@ final class IntervalException extends \Exception
     public readonly Periodicity $periodicity;
     public readonly array $availableIntervals;
 
-    public static function unavailable(Periodicity $periodicity, array $instervals, int $code = 0, ?\Throwable $previous = null): IntervalException
+    public static function unavailable(
+        Periodicity $periodicity,
+        array       $intervals,
+        int         $code = 0,
+        ?\Throwable $previous = null
+    ): IntervalException
     {
         $message = sprintf(
             'The periodicity %s is unknown. Choose one of available periodicity: %s',
             $periodicity->name,
-            join(', ', $instervals)
+            join(', ', $intervals)
         );
 
         $exception                     = new IntervalException($message, $code, $previous);
         $exception->periodicity        = $periodicity;
-        $exception->availableIntervals = $instervals;
+        $exception->availableIntervals = $intervals;
         return $exception;
     }
 }
diff --git a/app/Support/Calendar/Periodicity.php b/app/Support/Calendar/Periodicity.php
index 75c492bb13..83d5d449f9 100644
--- a/app/Support/Calendar/Periodicity.php
+++ b/app/Support/Calendar/Periodicity.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Bimonthly.php b/app/Support/Calendar/Periodicity/Bimonthly.php
index a8aac196fa..b521813bc1 100644
--- a/app/Support/Calendar/Periodicity/Bimonthly.php
+++ b/app/Support/Calendar/Periodicity/Bimonthly.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Daily.php b/app/Support/Calendar/Periodicity/Daily.php
index 39fc34196d..1ca47c983a 100644
--- a/app/Support/Calendar/Periodicity/Daily.php
+++ b/app/Support/Calendar/Periodicity/Daily.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Fortnightly.php b/app/Support/Calendar/Periodicity/Fortnightly.php
index a64880a058..cd9af54441 100644
--- a/app/Support/Calendar/Periodicity/Fortnightly.php
+++ b/app/Support/Calendar/Periodicity/Fortnightly.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/HalfYearly.php b/app/Support/Calendar/Periodicity/HalfYearly.php
index e8d6242bb2..f5bb2f0308 100644
--- a/app/Support/Calendar/Periodicity/HalfYearly.php
+++ b/app/Support/Calendar/Periodicity/HalfYearly.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Interspacable.php b/app/Support/Calendar/Periodicity/Interspacable.php
index a10658cdfc..e61f360dff 100644
--- a/app/Support/Calendar/Periodicity/Interspacable.php
+++ b/app/Support/Calendar/Periodicity/Interspacable.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Interval.php b/app/Support/Calendar/Periodicity/Interval.php
index 73db1f0409..1e40ef27b8 100644
--- a/app/Support/Calendar/Periodicity/Interval.php
+++ b/app/Support/Calendar/Periodicity/Interval.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Monthly.php b/app/Support/Calendar/Periodicity/Monthly.php
index 34cc9bf3e6..e1739a643a 100644
--- a/app/Support/Calendar/Periodicity/Monthly.php
+++ b/app/Support/Calendar/Periodicity/Monthly.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Quarterly.php b/app/Support/Calendar/Periodicity/Quarterly.php
index b20dc60250..46bac74728 100644
--- a/app/Support/Calendar/Periodicity/Quarterly.php
+++ b/app/Support/Calendar/Periodicity/Quarterly.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Weekly.php b/app/Support/Calendar/Periodicity/Weekly.php
index 519ea143d8..fa0724cefc 100644
--- a/app/Support/Calendar/Periodicity/Weekly.php
+++ b/app/Support/Calendar/Periodicity/Weekly.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/app/Support/Calendar/Periodicity/Yearly.php b/app/Support/Calendar/Periodicity/Yearly.php
index 768f3d87b3..466cb19640 100644
--- a/app/Support/Calendar/Periodicity/Yearly.php
+++ b/app/Support/Calendar/Periodicity/Yearly.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/CalculatorProvider.php b/tests/unit/Support/Calendar/CalculatorProvider.php
index 12f23d7363..800adb15b0 100644
--- a/tests/unit/Support/Calendar/CalculatorProvider.php
+++ b/tests/unit/Support/Calendar/CalculatorProvider.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/CalculatorTest.php b/tests/unit/Support/Calendar/CalculatorTest.php
index a5c8162a01..29662db573 100644
--- a/tests/unit/Support/Calendar/CalculatorTest.php
+++ b/tests/unit/Support/Calendar/CalculatorTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/BimonthlyTest.php b/tests/unit/Support/Calendar/Periodicity/BimonthlyTest.php
index e44b188e33..3bcd6977c5 100644
--- a/tests/unit/Support/Calendar/Periodicity/BimonthlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/BimonthlyTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/DailyTest.php b/tests/unit/Support/Calendar/Periodicity/DailyTest.php
index 56169a646b..c1175891d1 100644
--- a/tests/unit/Support/Calendar/Periodicity/DailyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/DailyTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/FortnightlyTest.php b/tests/unit/Support/Calendar/Periodicity/FortnightlyTest.php
index abc63993ec..3c2977074c 100644
--- a/tests/unit/Support/Calendar/Periodicity/FortnightlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/FortnightlyTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/HalfYearlyTest.php b/tests/unit/Support/Calendar/Periodicity/HalfYearlyTest.php
index fa15fbfc35..b12d6410e5 100644
--- a/tests/unit/Support/Calendar/Periodicity/HalfYearlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/HalfYearlyTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/IntervalProvider.php b/tests/unit/Support/Calendar/Periodicity/IntervalProvider.php
index 2c62f5802f..88e3cd63ae 100644
--- a/tests/unit/Support/Calendar/Periodicity/IntervalProvider.php
+++ b/tests/unit/Support/Calendar/Periodicity/IntervalProvider.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/IntervalTestCase.php b/tests/unit/Support/Calendar/Periodicity/IntervalTestCase.php
index a0cf5bb124..de3a640fd9 100644
--- a/tests/unit/Support/Calendar/Periodicity/IntervalTestCase.php
+++ b/tests/unit/Support/Calendar/Periodicity/IntervalTestCase.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/MonthlyTest.php b/tests/unit/Support/Calendar/Periodicity/MonthlyTest.php
index a9fe75d15d..c7235729c3 100644
--- a/tests/unit/Support/Calendar/Periodicity/MonthlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/MonthlyTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/QuarterlyTest.php b/tests/unit/Support/Calendar/Periodicity/QuarterlyTest.php
index 093276bcb1..60e6eba15c 100644
--- a/tests/unit/Support/Calendar/Periodicity/QuarterlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/QuarterlyTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/WeeklyTest.php b/tests/unit/Support/Calendar/Periodicity/WeeklyTest.php
index b2fa868518..598886b52a 100644
--- a/tests/unit/Support/Calendar/Periodicity/WeeklyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/WeeklyTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *
diff --git a/tests/unit/Support/Calendar/Periodicity/YearlyTest.php b/tests/unit/Support/Calendar/Periodicity/YearlyTest.php
index fb8e70d9d1..462f4ceaaa 100644
--- a/tests/unit/Support/Calendar/Periodicity/YearlyTest.php
+++ b/tests/unit/Support/Calendar/Periodicity/YearlyTest.php
@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Copyright (c) 2023 james@firefly-iii.org
+ * Copyright (c) 2023 Antonio Spinelli <https://github.com/tonicospinelli>
  *
  * This file is part of Firefly III (https://github.com/firefly-iii).
  *