diff --git a/data/countries/NL.yaml b/data/countries/NL.yaml
index 8c6f91513..85ade02b1 100644
--- a/data/countries/NL.yaml
+++ b/data/countries/NL.yaml
@@ -1,7 +1,9 @@
 holidays:
   # @attrib https://en.wikipedia.org/wiki/Public_holidays_in_the_Netherlands
   # @attrib https://nl.wikipedia.org/wiki/Feestdagen_in_Nederland
+  # @attrib https://nl.wikipedia.org/wiki/Koningsdag_(Nederland)
   # @source https://www.rijksoverheid.nl/onderwerpen/arbeidsovereenkomst-en-cao/vraag-en-antwoord/officiele-feestdagen
+  # @source https://www.government.nl/topics/working-hours/question-and-answer/public-holidays-in-the-netherlands
   # @source https://www.government.nl/topics/school-holidays/question-and-answer/on-which-public-holidays-are-schools-closed-in-the-netherlands
   NL:
     names:
@@ -15,39 +17,65 @@ holidays:
     days:
       01-01:
         _name: 01-01
+      # @source https://www.rijksoverheid.nl/onderwerpen/arbeidsovereenkomst-en-cao/vraag-en-antwoord/goede-vrijdag-vrije-dag
       easter -2:
         _name: easter -2
+        type: school
       easter:
         _name: easter
       easter 1:
         _name: easter 1
-      04-27 if sunday then previous saturday:
+      # @source https://www.rijksoverheid.nl/onderwerpen/arbeidsovereenkomst-en-cao/vraag-en-antwoord/koningsdag-27-april-vrije-dag
+      04-27 if sunday then previous saturday since 2014:
         name:
           nl: Koningsdag
+          en: King's Day
+      04-30 if sunday then next monday since 1949 and prior to 1980:
+        name:
+          nl: Koninginnedag
+          en: Queen's Day
+      04-30 if sunday then previous saturday since 1980 and prior to 2014:
+        name:
+          nl: Koninginnedag
+          en: Queen's Day
       05-04:
         name:
           nl: Nationale Dodenherdenking
         type: observance
-      # @source https://www.rijksoverheid.nl/onderwerpen/tweede-wereldoorlog/vraag-en-antwoord/bevrijdingsdag-5-mei-vrije-dag
+      # @source https://www.rijksoverheid.nl/onderwerpen/arbeidsovereenkomst-en-cao/vraag-en-antwoord/bevrijdingsdag-5-mei-vrije-dag
       05-05:
         name:
           nl: Bevrijdingsdag
-        type: observance
+          en: Liberation Day
+        type: school
       2nd sunday in May:
         _name: Mothers Day
         type: observance
-      3rd sunday in June:
-        _name: Fathers Day
-        type: observance
+      # @source https://www.rijksoverheid.nl/onderwerpen/arbeidsovereenkomst-en-cao/vraag-en-antwoord/hemelvaartsdag-vrije-dag
       easter 39:
         _name: easter 39
+        name:
+          nl: Hemelvaartsdag
       easter 49:
         _name: easter 49
+      # @source https://www.rijksoverheid.nl/onderwerpen/arbeidsovereenkomst-en-cao/vraag-en-antwoord/is-tweede-pinksterdag-een-vrije-dag
       easter 50:
         _name: easter 50
+      3rd sunday in June:
+        _name: Fathers Day
+        type: observance
+      08-31 since 1885 and prior to 1891:
+        name:
+          nl: Princessedag
+          en: Princess Day
+      08-31 since 1891 and prior to 1949:
+        name:
+          nl: Koninginnedag
+          en: Queen's Day
       3rd tuesday in September:
         name:
           nl: Prinsjesdag
+          en: Prince's Day
         note: Scholen in Den Haag geven meestal 1 dag vrij
         type: observance
       11-11:
diff --git a/test/fixtures/NL-2015.json b/test/fixtures/NL-2015.json
index 869e8c032..0eef1d34d 100644
--- a/test/fixtures/NL-2015.json
+++ b/test/fixtures/NL-2015.json
@@ -13,7 +13,7 @@
     "start": "2015-04-02T22:00:00.000Z",
     "end": "2015-04-03T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2015-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Mon"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2015-05-04T22:00:00.000Z",
     "end": "2015-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Tue"
   },
@@ -75,7 +75,7 @@
     "date": "2015-05-14 00:00:00",
     "start": "2015-05-13T22:00:00.000Z",
     "end": "2015-05-14T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2016.json b/test/fixtures/NL-2016.json
index 1da5bcbcf..0a80868d9 100644
--- a/test/fixtures/NL-2016.json
+++ b/test/fixtures/NL-2016.json
@@ -13,7 +13,7 @@
     "start": "2016-03-24T23:00:00.000Z",
     "end": "2016-03-25T23:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2016-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Wed"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2016-05-04T22:00:00.000Z",
     "end": "2016-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Thu"
   },
@@ -66,7 +66,7 @@
     "date": "2016-05-05 00:00:00",
     "start": "2016-05-04T22:00:00.000Z",
     "end": "2016-05-05T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2017.json b/test/fixtures/NL-2017.json
index 1e101f496..e5a3fce85 100644
--- a/test/fixtures/NL-2017.json
+++ b/test/fixtures/NL-2017.json
@@ -13,7 +13,7 @@
     "start": "2017-04-13T22:00:00.000Z",
     "end": "2017-04-14T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2017-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Thu"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2017-05-04T22:00:00.000Z",
     "end": "2017-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Fri"
   },
@@ -75,7 +75,7 @@
     "date": "2017-05-25 00:00:00",
     "start": "2017-05-24T22:00:00.000Z",
     "end": "2017-05-25T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2018.json b/test/fixtures/NL-2018.json
index f460e7370..de946ad35 100644
--- a/test/fixtures/NL-2018.json
+++ b/test/fixtures/NL-2018.json
@@ -13,7 +13,7 @@
     "start": "2018-03-29T22:00:00.000Z",
     "end": "2018-03-30T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2018-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Fri"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2018-05-04T22:00:00.000Z",
     "end": "2018-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Sat"
   },
@@ -66,7 +66,7 @@
     "date": "2018-05-10 00:00:00",
     "start": "2018-05-09T22:00:00.000Z",
     "end": "2018-05-10T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2019.json b/test/fixtures/NL-2019.json
index 1addb6890..deac45094 100644
--- a/test/fixtures/NL-2019.json
+++ b/test/fixtures/NL-2019.json
@@ -13,7 +13,7 @@
     "start": "2019-04-18T22:00:00.000Z",
     "end": "2019-04-19T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2019-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Sat"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2019-05-04T22:00:00.000Z",
     "end": "2019-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Sun"
   },
@@ -75,7 +75,7 @@
     "date": "2019-05-30 00:00:00",
     "start": "2019-05-29T22:00:00.000Z",
     "end": "2019-05-30T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2020.json b/test/fixtures/NL-2020.json
index 9ec5ce586..727e5ba66 100644
--- a/test/fixtures/NL-2020.json
+++ b/test/fixtures/NL-2020.json
@@ -13,7 +13,7 @@
     "start": "2020-04-09T22:00:00.000Z",
     "end": "2020-04-10T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2020-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Mon"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2020-05-04T22:00:00.000Z",
     "end": "2020-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Tue"
   },
@@ -75,7 +75,7 @@
     "date": "2020-05-21 00:00:00",
     "start": "2020-05-20T22:00:00.000Z",
     "end": "2020-05-21T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2021.json b/test/fixtures/NL-2021.json
index df1582c82..ea28bf496 100644
--- a/test/fixtures/NL-2021.json
+++ b/test/fixtures/NL-2021.json
@@ -13,7 +13,7 @@
     "start": "2021-04-01T22:00:00.000Z",
     "end": "2021-04-02T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2021-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Tue"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2021-05-04T22:00:00.000Z",
     "end": "2021-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Wed"
   },
@@ -75,7 +75,7 @@
     "date": "2021-05-13 00:00:00",
     "start": "2021-05-12T22:00:00.000Z",
     "end": "2021-05-13T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2022.json b/test/fixtures/NL-2022.json
index 3edfe72ca..66032084c 100644
--- a/test/fixtures/NL-2022.json
+++ b/test/fixtures/NL-2022.json
@@ -13,7 +13,7 @@
     "start": "2022-04-14T22:00:00.000Z",
     "end": "2022-04-15T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2022-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Wed"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2022-05-04T22:00:00.000Z",
     "end": "2022-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Thu"
   },
@@ -75,7 +75,7 @@
     "date": "2022-05-26 00:00:00",
     "start": "2022-05-25T22:00:00.000Z",
     "end": "2022-05-26T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2023.json b/test/fixtures/NL-2023.json
index 959d8a8cc..9fa12d7af 100644
--- a/test/fixtures/NL-2023.json
+++ b/test/fixtures/NL-2023.json
@@ -13,7 +13,7 @@
     "start": "2023-04-06T22:00:00.000Z",
     "end": "2023-04-07T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2023-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Thu"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2023-05-04T22:00:00.000Z",
     "end": "2023-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Fri"
   },
@@ -75,7 +75,7 @@
     "date": "2023-05-18 00:00:00",
     "start": "2023-05-17T22:00:00.000Z",
     "end": "2023-05-18T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2024.json b/test/fixtures/NL-2024.json
index 331f74ce6..e2744c486 100644
--- a/test/fixtures/NL-2024.json
+++ b/test/fixtures/NL-2024.json
@@ -13,7 +13,7 @@
     "start": "2024-03-28T23:00:00.000Z",
     "end": "2024-03-29T23:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2024-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Sat"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2024-05-04T22:00:00.000Z",
     "end": "2024-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Sun"
   },
@@ -66,7 +66,7 @@
     "date": "2024-05-09 00:00:00",
     "start": "2024-05-08T22:00:00.000Z",
     "end": "2024-05-09T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2025.json b/test/fixtures/NL-2025.json
index 7612a2cce..0d70e45e1 100644
--- a/test/fixtures/NL-2025.json
+++ b/test/fixtures/NL-2025.json
@@ -13,7 +13,7 @@
     "start": "2025-04-17T22:00:00.000Z",
     "end": "2025-04-18T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2025-04-26T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Sat"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2025-05-04T22:00:00.000Z",
     "end": "2025-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Mon"
   },
@@ -75,7 +75,7 @@
     "date": "2025-05-29 00:00:00",
     "start": "2025-05-28T22:00:00.000Z",
     "end": "2025-05-29T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2026.json b/test/fixtures/NL-2026.json
index 7f274d45f..a0718c5b2 100644
--- a/test/fixtures/NL-2026.json
+++ b/test/fixtures/NL-2026.json
@@ -13,7 +13,7 @@
     "start": "2026-04-02T22:00:00.000Z",
     "end": "2026-04-03T22:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2026-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Mon"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2026-05-04T22:00:00.000Z",
     "end": "2026-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Tue"
   },
@@ -75,7 +75,7 @@
     "date": "2026-05-14 00:00:00",
     "start": "2026-05-13T22:00:00.000Z",
     "end": "2026-05-14T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"
diff --git a/test/fixtures/NL-2027.json b/test/fixtures/NL-2027.json
index ab411ce82..57f95f479 100644
--- a/test/fixtures/NL-2027.json
+++ b/test/fixtures/NL-2027.json
@@ -13,7 +13,7 @@
     "start": "2027-03-25T23:00:00.000Z",
     "end": "2027-03-26T23:00:00.000Z",
     "name": "Goede Vrijdag",
-    "type": "public",
+    "type": "school",
     "rule": "easter -2",
     "_weekday": "Fri"
   },
@@ -41,7 +41,7 @@
     "end": "2027-04-27T22:00:00.000Z",
     "name": "Koningsdag",
     "type": "public",
-    "rule": "04-27 if sunday then previous saturday",
+    "rule": "04-27 if sunday then previous saturday since 2014",
     "_weekday": "Tue"
   },
   {
@@ -58,7 +58,7 @@
     "start": "2027-05-04T22:00:00.000Z",
     "end": "2027-05-05T22:00:00.000Z",
     "name": "Bevrijdingsdag",
-    "type": "observance",
+    "type": "school",
     "rule": "05-05",
     "_weekday": "Wed"
   },
@@ -66,7 +66,7 @@
     "date": "2027-05-06 00:00:00",
     "start": "2027-05-05T22:00:00.000Z",
     "end": "2027-05-06T22:00:00.000Z",
-    "name": "O.L.H. Hemelvaart",
+    "name": "Hemelvaartsdag",
     "type": "public",
     "rule": "easter 39",
     "_weekday": "Thu"