diff --git a/package-lock.json b/package-lock.json
index 063e645a..1d75568f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7481,14 +7481,14 @@
       "dev": true
     },
     "jdnconvertiblecalendar": {
-      "version": "0.0.6",
-      "resolved": "https://registry.npmjs.org/jdnconvertiblecalendar/-/jdnconvertiblecalendar-0.0.6.tgz",
-      "integrity": "sha512-3+g+PpPCPPoeyMBj6XywUZR7CHAm9F3sVdHsvUSt1K9pIbxgrE6GH7RETIk2EdPdCXVEUWt/Ia+gVAT9oMOxlw=="
+      "version": "0.0.7",
+      "resolved": "https://registry.npmjs.org/jdnconvertiblecalendar/-/jdnconvertiblecalendar-0.0.7.tgz",
+      "integrity": "sha512-go3zH4JtyJSBICC3prJzy6AAKLfV7a4+q5DOvuTYMPewiGftUKnthuCORZou9VGhv9sE/qsky2xkGamUurQPRQ=="
     },
     "jdnconvertiblecalendardateadapter": {
-      "version": "0.0.16",
-      "resolved": "https://registry.npmjs.org/jdnconvertiblecalendardateadapter/-/jdnconvertiblecalendardateadapter-0.0.16.tgz",
-      "integrity": "sha512-GumYc4bTHN0sXVPfUcCDYDkHqTTsgfg98onCbSnH8tFXgEddyoyLWLbxBfDxW/QTdDQYvZ5amn7OxcYeNGVaJQ==",
+      "version": "0.0.17",
+      "resolved": "https://registry.npmjs.org/jdnconvertiblecalendardateadapter/-/jdnconvertiblecalendardateadapter-0.0.17.tgz",
+      "integrity": "sha512-IhZkUfabEjy2+zUD8W7Y+odkDCHz4fB1wEnBBS2NGoWAJGXceB2yuogi8fCgCcY87PmJqrgSaZOEGmSuxaMAFg==",
       "requires": {
         "tslib": "^2.0.0"
       }
diff --git a/package.json b/package.json
index ac8cd72d..e5492435 100644
--- a/package.json
+++ b/package.json
@@ -47,8 +47,8 @@
     "@ckeditor/ckeditor5-angular": "^1.2.3",
     "@dasch-swiss/dsp-js": "^2.2.0",
     "ckeditor5-custom-build": "github:dasch-swiss/ckeditor_custom_build",
-    "jdnconvertiblecalendar": "^0.0.6",
-    "jdnconvertiblecalendardateadapter": "^0.0.16",
+    "jdnconvertiblecalendar": "^0.0.7",
+    "jdnconvertiblecalendardateadapter": "^0.0.17",
     "ngx-color-picker": "^11.0.0",
     "openseadragon": "^2.4.2",
     "rxjs": "~6.5.5",
diff --git a/projects/dsp-ui/package.json b/projects/dsp-ui/package.json
index 583e8461..d51dd76a 100644
--- a/projects/dsp-ui/package.json
+++ b/projects/dsp-ui/package.json
@@ -25,8 +25,8 @@
     "@angular/material": "^11.2.5",
     "@angular/cdk": "^11.2.5",
     "@dasch-swiss/dsp-js": "^2.2.0",
-    "jdnconvertiblecalendar": "^0.0.6",
-    "jdnconvertiblecalendardateadapter": "^0.0.16",
+    "jdnconvertiblecalendar": "^0.0.7",
+    "jdnconvertiblecalendardateadapter": "^0.0.17",
     "ngx-color-picker": "^11.0.0",
     "openseadragon": "^2.4.2",
     "svg-overlay": "github:openseadragon/svg-overlay",
diff --git a/projects/dsp-ui/src/lib/viewer/services/value.service.spec.ts b/projects/dsp-ui/src/lib/viewer/services/value.service.spec.ts
index 8dba5c15..ce5e08ea 100644
--- a/projects/dsp-ui/src/lib/viewer/services/value.service.spec.ts
+++ b/projects/dsp-ui/src/lib/viewer/services/value.service.spec.ts
@@ -262,8 +262,8 @@ describe('ValueService', () => {
 
             const period = calDateJDN.toJDNPeriod();
 
-            expect(period.periodStart).toEqual(1721060);
-            expect(period.periodEnd).toEqual(1721060);
+            expect(period.periodStart).toEqual(1721058);
+            expect(period.periodEnd).toEqual(1721058);
 
         });