diff --git a/EHS/CH_mCSD/CH-ITI-90-Organization-GetRequest-ValidationProfile.json b/EHS/CH_mCSD/CH-ITI-90-Organization-GetRequest-ValidationProfile.json
index 3aef30047f8123040c4ef802450119413281219c..9eff415fcf2b88c4c9eaa73b3d489919da36cd79 100644
--- a/EHS/CH_mCSD/CH-ITI-90-Organization-GetRequest-ValidationProfile.json
+++ b/EHS/CH_mCSD/CH-ITI-90-Organization-GetRequest-ValidationProfile.json
@@ -166,7 +166,7 @@
           "checks": [
             {
               "type": "REGEX",
-              "regex": "^(ge|le)?[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|1d|2[0-8]|3[01])$"
+              "regex": "^(ge|le)?[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|1\\d|2[0-9]|3[01])$"
             }
           ]
         },
diff --git a/EHS/CH_mCSD/CH-ITI-90-Practitioner-GetRequest-ValidationProfile.json b/EHS/CH_mCSD/CH-ITI-90-Practitioner-GetRequest-ValidationProfile.json
index a026a19d90e228e7aeecdabc5df55881148d8da7..1de88ccd62f34e5c7129b7d261f861f0eff67870 100644
--- a/EHS/CH_mCSD/CH-ITI-90-Practitioner-GetRequest-ValidationProfile.json
+++ b/EHS/CH_mCSD/CH-ITI-90-Practitioner-GetRequest-ValidationProfile.json
@@ -167,7 +167,7 @@
       "checks": [
         {
           "type": "REGEX",
-          "regex": "^(ge|le)?[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|1d|2[0-8]|3[01])$"
+          "regex": "^(ge|le)?[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|1\\d|2[0-9]|3[01])$"
         }
       ]
     },
diff --git a/EHS/CH_mCSD/CH-ITI-90-PractitionerRole-GetRequest-ValidationProfile.json b/EHS/CH_mCSD/CH-ITI-90-PractitionerRole-GetRequest-ValidationProfile.json
index a1788d36a02ffdd07b44b31199c86c5a152bd39f..03afcd40298438cdb6dd24562bd2f16150319cb6 100644
--- a/EHS/CH_mCSD/CH-ITI-90-PractitionerRole-GetRequest-ValidationProfile.json
+++ b/EHS/CH_mCSD/CH-ITI-90-PractitionerRole-GetRequest-ValidationProfile.json
@@ -167,7 +167,7 @@
       "checks": [
         {
           "type": "REGEX",
-          "regex": "^(ge|le)?[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|1d|2[0-8]|3[01])$"
+          "regex": "^(ge|le)?[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|1\\d|2[0-9]|3[01])$"
         }
       ]
     },
diff --git a/EHS/CH_mCSD/README.md b/EHS/CH_mCSD/README.md
index 2485bbe776ca3957b732ce8bdffa653ef66fda96..7b022c85478278d2762c79ac834c73b629626806 100644
--- a/EHS/CH_mCSD/README.md
+++ b/EHS/CH_mCSD/README.md
@@ -22,7 +22,7 @@ date: 2023-03-14
 |   _id_parameter_presence   |   OCCURENCE   | 0..1 |   _id parameter can be used only once. |
 |   _id_parameter_value   |   REGEX   |   `^\S+$` |   _id parameter is a token.  |
 |   _lastUpdated_parameter_presence   |   OCCURENCE   | 0..1 |   _lastUpdated parameter can be used only once. |
-|   _lastUpdated_parameter_value   |   REGEX   |   `^(ge\|le)?[0-9]{4}-(0[1-9]\|1[0-2])-(0[1-9]\|1\d\|2[0-8]\|3[01])$` | _lastUpdated parameter is made of a date eventually preceded by a modifier ge or le.    |
+|   _lastUpdated_parameter_value   |   REGEX   |   `^(ge\|le)?[0-9]{4}-(0[1-9]\|1[0-2])-(0[1-9]\|1\d\|2[0-9]\|3[01])$` | _lastUpdated parameter is made of a date eventually preceded by a modifier ge or le.    |
 |   _format_parameter_presence   |   OCCURENCE   | 0..1 |   _format parameter can be used only once. |
 |   _format_parameter_value   |   CLOSEDLIST   |   [json,xml] |   _format parameter's value shall be either json or xml.
 |   _sort_parameter_presence   |   OCCURENCE   | 0..1 |   _sort parameter can be used only once. |