diff --git a/tests/draft2019-09/optional/format/date.json b/tests/draft2019-09/optional/format/date.json
index 1ba5d9ca..652238c3 100644
--- a/tests/draft2019-09/optional/format/date.json
+++ b/tests/draft2019-09/optional/format/date.json
@@ -245,6 +245,54 @@
                 "description": "an invalid time string in date-time format",
                 "data": "2020-11-28T23:55:45Z",
                 "valid": false
+            },
+            {
+                "description": "year 0000 is a leap year (0 % 400 == 0)",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — year zero leap year edge case",
+                "data": "0000-02-29",
+                "valid": true
+            },
+            {
+                "description": "century year 0100 is not a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — 100 % 100 == 0 but 100 % 400 != 0",
+                "data": "0100-02-29",
+                "valid": false
+            },
+            {
+                "description": "century year 0400 is a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — 400-year cycle boundary",
+                "data": "0400-02-29",
+                "valid": true
+            },
+            {
+                "description": "century year 2100 is not a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — future century year",
+                "data": "2100-02-29",
+                "valid": false
+            },
+            {
+                "description": "invalid: leading whitespace is not permitted",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — full-date grammar does not include whitespace",
+                "data": " 2024-01-15",
+                "valid": false
+            },
+            {
+                "description": "invalid: trailing whitespace is not permitted",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — full-date grammar does not include whitespace",
+                "data": "2024-01-15 ",
+                "valid": false
+            },
+            {
+                "description": "invalid: month 00 is not valid per date-month range 01-12",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — date-month = 2DIGIT ; 01-12",
+                "data": "2024-00-15",
+                "valid": false
+            },
+            {
+                "description": "invalid: day 00 is not valid per date-mday minimum of 01",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — date-mday = 2DIGIT ; 01-28/29/30/31",
+                "data": "2024-01-00",
+                "valid": false
             }
         ]
     }
diff --git a/tests/draft2020-12/optional/format/date.json b/tests/draft2020-12/optional/format/date.json
index 01731c34..7e5df1ac 100644
--- a/tests/draft2020-12/optional/format/date.json
+++ b/tests/draft2020-12/optional/format/date.json
@@ -245,6 +245,54 @@
                 "description": "an invalid time string in date-time format",
                 "data": "2020-11-28T23:55:45Z",
                 "valid": false
+            },
+            {
+                "description": "year 0000 is a leap year (0 % 400 == 0)",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — year zero leap year edge case",
+                "data": "0000-02-29",
+                "valid": true
+            },
+            {
+                "description": "century year 0100 is not a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — 100 % 100 == 0 but 100 % 400 != 0",
+                "data": "0100-02-29",
+                "valid": false
+            },
+            {
+                "description": "century year 0400 is a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — 400-year cycle boundary",
+                "data": "0400-02-29",
+                "valid": true
+            },
+            {
+                "description": "century year 2100 is not a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — future century year",
+                "data": "2100-02-29",
+                "valid": false
+            },
+            {
+                "description": "invalid: leading whitespace is not permitted",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — full-date grammar does not include whitespace",
+                "data": " 2024-01-15",
+                "valid": false
+            },
+            {
+                "description": "invalid: trailing whitespace is not permitted",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — full-date grammar does not include whitespace",
+                "data": "2024-01-15 ",
+                "valid": false
+            },
+            {
+                "description": "invalid: month 00 is not valid per date-month range 01-12",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — date-month = 2DIGIT ; 01-12",
+                "data": "2024-00-15",
+                "valid": false
+            },
+            {
+                "description": "invalid: day 00 is not valid per date-mday minimum of 01",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — date-mday = 2DIGIT ; 01-28/29/30/31",
+                "data": "2024-01-00",
+                "valid": false
             }
         ]
     }
diff --git a/tests/draft7/optional/format/date.json b/tests/draft7/optional/format/date.json
index 2cfdcf3f..05d9a035 100644
--- a/tests/draft7/optional/format/date.json
+++ b/tests/draft7/optional/format/date.json
@@ -242,6 +242,54 @@
                 "description": "an invalid time string in date-time format",
                 "data": "2020-11-28T23:55:45Z",
                 "valid": false
+            },
+            {
+                "description": "year 0000 is a leap year (0 % 400 == 0)",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — year zero leap year edge case",
+                "data": "0000-02-29",
+                "valid": true
+            },
+            {
+                "description": "century year 0100 is not a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — 100 % 100 == 0 but 100 % 400 != 0",
+                "data": "0100-02-29",
+                "valid": false
+            },
+            {
+                "description": "century year 0400 is a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — 400-year cycle boundary",
+                "data": "0400-02-29",
+                "valid": true
+            },
+            {
+                "description": "century year 2100 is not a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — future century year",
+                "data": "2100-02-29",
+                "valid": false
+            },
+            {
+                "description": "invalid: leading whitespace is not permitted",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — full-date grammar does not include whitespace",
+                "data": " 2024-01-15",
+                "valid": false
+            },
+            {
+                "description": "invalid: trailing whitespace is not permitted",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — full-date grammar does not include whitespace",
+                "data": "2024-01-15 ",
+                "valid": false
+            },
+            {
+                "description": "invalid: month 00 is not valid per date-month range 01-12",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — date-month = 2DIGIT ; 01-12",
+                "data": "2024-00-15",
+                "valid": false
+            },
+            {
+                "description": "invalid: day 00 is not valid per date-mday minimum of 01",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — date-mday = 2DIGIT ; 01-28/29/30/31",
+                "data": "2024-01-00",
+                "valid": false
             }
         ]
     }
diff --git a/tests/v1/format/date.json b/tests/v1/format/date.json
index f120d37e..0285b4e4 100644
--- a/tests/v1/format/date.json
+++ b/tests/v1/format/date.json
@@ -245,6 +245,54 @@
                 "description": "an invalid time string in date-time format",
                 "data": "2020-11-28T23:55:45Z",
                 "valid": false
+            },
+            {
+                "description": "year 0000 is a leap year (0 % 400 == 0)",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — year zero leap year edge case",
+                "data": "0000-02-29",
+                "valid": true
+            },
+            {
+                "description": "century year 0100 is not a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — 100 % 100 == 0 but 100 % 400 != 0",
+                "data": "0100-02-29",
+                "valid": false
+            },
+            {
+                "description": "century year 0400 is a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — 400-year cycle boundary",
+                "data": "0400-02-29",
+                "valid": true
+            },
+            {
+                "description": "century year 2100 is not a leap year",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#appendix-C — future century year",
+                "data": "2100-02-29",
+                "valid": false
+            },
+            {
+                "description": "invalid: leading whitespace is not permitted",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — full-date grammar does not include whitespace",
+                "data": " 2024-01-15",
+                "valid": false
+            },
+            {
+                "description": "invalid: trailing whitespace is not permitted",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — full-date grammar does not include whitespace",
+                "data": "2024-01-15 ",
+                "valid": false
+            },
+            {
+                "description": "invalid: month 00 is not valid per date-month range 01-12",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — date-month = 2DIGIT ; 01-12",
+                "data": "2024-00-15",
+                "valid": false
+            },
+            {
+                "description": "invalid: day 00 is not valid per date-mday minimum of 01",
+                "comment": "https://www.rfc-editor.org/rfc/rfc3339#section-5.6 — date-mday = 2DIGIT ; 01-28/29/30/31",
+                "data": "2024-01-00",
+                "valid": false
             }
         ]
     }