diff --git a/geneit_app/package-lock.json b/geneit_app/package-lock.json
index 174d238..8622b02 100644
--- a/geneit_app/package-lock.json
+++ b/geneit_app/package-lock.json
@@ -23,6 +23,7 @@
         "@mui/lab": "^5.0.0-alpha.140",
         "@mui/material": "^5.15.17",
         "@mui/x-data-grid": "^7.1.1",
+        "@mui/x-date-pickers": "^7.7.0",
         "@mui/x-tree-view": "^7.4.0",
         "@testing-library/jest-dom": "^6.4.5",
         "@testing-library/react": "^16.0.0",
@@ -32,6 +33,7 @@
         "@types/react-dom": "^18.3.0",
         "@vitejs/plugin-react": "^4.2.1",
         "date-and-time": "^3.2.0",
+        "dayjs": "^1.11.11",
         "email-validator": "^2.0.4",
         "filesize": "^10.1.2",
         "jspdf": "^2.5.1",
@@ -1579,6 +1581,71 @@
         "react-dom": "^17.0.0 || ^18.0.0"
       }
     },
+    "node_modules/@mui/x-date-pickers": {
+      "version": "7.7.0",
+      "resolved": "https://registry.npmjs.org/@mui/x-date-pickers/-/x-date-pickers-7.7.0.tgz",
+      "integrity": "sha512-huyoA22Vi8iCkee6ro0sX7CcFIcPV/Fl7ZGWwaQC8PTAheXhz823DjMYAiwRU/imF+UFYfUInWQ4XZCIkM+2Dw==",
+      "dependencies": {
+        "@babel/runtime": "^7.24.7",
+        "@mui/base": "^5.0.0-beta.40",
+        "@mui/system": "^5.15.15",
+        "@mui/utils": "^5.15.14",
+        "@types/react-transition-group": "^4.4.10",
+        "clsx": "^2.1.1",
+        "prop-types": "^15.8.1",
+        "react-transition-group": "^4.4.5"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/mui-org"
+      },
+      "peerDependencies": {
+        "@emotion/react": "^11.9.0",
+        "@emotion/styled": "^11.8.1",
+        "@mui/material": "^5.15.14",
+        "date-fns": "^2.25.0 || ^3.2.0",
+        "date-fns-jalali": "^2.13.0-0 || ^3.2.0-0",
+        "dayjs": "^1.10.7",
+        "luxon": "^3.0.2",
+        "moment": "^2.29.4",
+        "moment-hijri": "^2.1.2",
+        "moment-jalaali": "^0.7.4 || ^0.8.0 || ^0.9.0 || ^0.10.0",
+        "react": "^17.0.0 || ^18.0.0",
+        "react-dom": "^17.0.0 || ^18.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@emotion/react": {
+          "optional": true
+        },
+        "@emotion/styled": {
+          "optional": true
+        },
+        "date-fns": {
+          "optional": true
+        },
+        "date-fns-jalali": {
+          "optional": true
+        },
+        "dayjs": {
+          "optional": true
+        },
+        "luxon": {
+          "optional": true
+        },
+        "moment": {
+          "optional": true
+        },
+        "moment-hijri": {
+          "optional": true
+        },
+        "moment-jalaali": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@mui/x-tree-view": {
       "version": "7.7.0",
       "resolved": "https://registry.npmjs.org/@mui/x-tree-view/-/x-tree-view-7.7.0.tgz",
@@ -2552,6 +2619,11 @@
       "integrity": "sha512-UguWfh9LkUecVrGSE0B7SpAnGRMPATmpwSoSij24/lDnwET3A641abfDBD/TdL0T+E04f8NWlbMkD9BscVvIZg==",
       "license": "MIT"
     },
+    "node_modules/dayjs": {
+      "version": "1.11.11",
+      "resolved": "https://registry.npmjs.org/dayjs/-/dayjs-1.11.11.tgz",
+      "integrity": "sha512-okzr3f11N6WuqYtZSvm+F776mB41wRZMhKP+hc34YdW+KmtYYK9iqvHSwo2k9FEH3fhGXvOPV6yz2IcSrfRUDg=="
+    },
     "node_modules/debug": {
       "version": "4.3.4",
       "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.4.tgz",
diff --git a/geneit_app/package.json b/geneit_app/package.json
index ce72f20..f7872ec 100644
--- a/geneit_app/package.json
+++ b/geneit_app/package.json
@@ -19,6 +19,7 @@
     "@mui/lab": "^5.0.0-alpha.140",
     "@mui/material": "^5.15.17",
     "@mui/x-data-grid": "^7.1.1",
+    "@mui/x-date-pickers": "^7.7.0",
     "@mui/x-tree-view": "^7.4.0",
     "@testing-library/jest-dom": "^6.4.5",
     "@testing-library/react": "^16.0.0",
@@ -28,6 +29,7 @@
     "@types/react-dom": "^18.3.0",
     "@vitejs/plugin-react": "^4.2.1",
     "date-and-time": "^3.2.0",
+    "dayjs": "^1.11.11",
     "email-validator": "^2.0.4",
     "filesize": "^10.1.2",
     "jspdf": "^2.5.1",
diff --git a/geneit_app/src/dialogs/accommodations/CreateAccommodationCalendarURLDialog.tsx b/geneit_app/src/dialogs/accommodations/CreateAccommodationCalendarURLDialog.tsx
index f1fe0b8..d95abf0 100644
--- a/geneit_app/src/dialogs/accommodations/CreateAccommodationCalendarURLDialog.tsx
+++ b/geneit_app/src/dialogs/accommodations/CreateAccommodationCalendarURLDialog.tsx
@@ -9,9 +9,9 @@ import React from "react";
 import { ServerApi } from "../../api/ServerApi";
 import { NewCalendarURL } from "../../api/accommodations/AccommodationsCalendarURLApi";
 import { checkConstraint } from "../../utils/from_utils";
+import { useAccommodations } from "../../widgets/accommodations/BaseAccommodationsRoute";
 import { PropEdit } from "../../widgets/forms/PropEdit";
 import { PropSelect } from "../../widgets/forms/PropSelect";
-import { useAccommodations } from "../../widgets/accommodations/BaseAccommodationsRoute";
 
 export function CreateAccommodationCalendarURLDialog(p: {
   open: boolean;
diff --git a/geneit_app/src/dialogs/accommodations/UpdateReservationDialog.tsx b/geneit_app/src/dialogs/accommodations/UpdateReservationDialog.tsx
index 75fc5e4..841aae9 100644
--- a/geneit_app/src/dialogs/accommodations/UpdateReservationDialog.tsx
+++ b/geneit_app/src/dialogs/accommodations/UpdateReservationDialog.tsx
@@ -8,6 +8,7 @@ import {
 import React from "react";
 import { UpdateAccommodationReservation } from "../../api/accommodations/AccommodationsReservationsApi";
 import { useAccommodations } from "../../widgets/accommodations/BaseAccommodationsRoute";
+import { PropDateInput } from "../../widgets/forms/PropDateInput";
 import { PropSelect } from "../../widgets/forms/PropSelect";
 
 export function UpdateReservationDialog(p: {
@@ -41,6 +42,8 @@ export function UpdateReservationDialog(p: {
     if (!reservation) setReservation(p.reservation);
   }, [p.open, p.reservation]);
 
+  // TODO : check availability
+
   return (
     <Dialog open={p.open} onClose={cancel}>
       <DialogTitle>
@@ -66,6 +69,31 @@ export function UpdateReservationDialog(p: {
           value={reservation?.accommodation_id?.toString()}
         />
 
+        <PropDateInput
+          editable
+          label="Date de début"
+          value={reservation?.start}
+          onChange={(s) => {
+            setReservation((r) => {
+              return { ...r!, start: s ?? -1 };
+            });
+          }}
+        />
+
+        <PropDateInput
+          editable
+          label="Date de fin"
+          value={reservation?.end}
+          lastSecOfDay={true}
+          onChange={(s) => {
+            setReservation((r) => {
+              return { ...r!, end: s ?? -1 };
+            });
+          }}
+        />
+
+        {/* Constraint start and end */}
+
         {/* TODO : la suite */}
       </DialogContent>
       <DialogActions>
diff --git a/geneit_app/src/routes/family/accommodations/AccommodationsReservationsRoute.tsx b/geneit_app/src/routes/family/accommodations/AccommodationsReservationsRoute.tsx
index 2fa5c6e..5d979a8 100644
--- a/geneit_app/src/routes/family/accommodations/AccommodationsReservationsRoute.tsx
+++ b/geneit_app/src/routes/family/accommodations/AccommodationsReservationsRoute.tsx
@@ -65,8 +65,8 @@ export function AccommodationsReservationsRoute(): React.ReactElement {
     updateReservation(
       {
         accommodation_id: -1,
-        start: Math.floor(d.start.getDate() / 1000),
-        end: Math.floor(d.end.getDate() / 1000),
+        start: Math.floor(d.start.getTime() / 1000),
+        end: Math.floor(d.end.getTime() / 1000),
       },
       true
     );
diff --git a/geneit_app/src/utils/time_utils.ts b/geneit_app/src/utils/time_utils.ts
new file mode 100644
index 0000000..aea8b50
--- /dev/null
+++ b/geneit_app/src/utils/time_utils.ts
@@ -0,0 +1,6 @@
+/**
+ * Get formatted UNIX date
+ */
+export function fmtUnixDate(time: number): string {
+  return new Date(time * 1000).toLocaleString("fr-FR");
+}
diff --git a/geneit_app/src/widgets/forms/PropDateInput.tsx b/geneit_app/src/widgets/forms/PropDateInput.tsx
new file mode 100644
index 0000000..914de98
--- /dev/null
+++ b/geneit_app/src/widgets/forms/PropDateInput.tsx
@@ -0,0 +1,53 @@
+import { LocalizationProvider } from "@mui/x-date-pickers";
+import { AdapterDayjs } from "@mui/x-date-pickers/AdapterDayjs";
+import { DatePicker } from "@mui/x-date-pickers/DatePicker";
+import dayjs from "dayjs";
+import { fmtUnixDate } from "../../utils/time_utils";
+import { PropEdit } from "./PropEdit";
+
+export function PropDateInput(p: {
+  editable: boolean;
+  label: string;
+  value: number | undefined;
+  onChange: (v: number | undefined) => void;
+  lastSecOfDay?: boolean;
+}): React.ReactElement {
+  let shiftV = p.value;
+  if (shiftV && p.lastSecOfDay) {
+    const d = new Date(shiftV * 1000);
+    if (d.getHours() === 0) {
+      shiftV -= 1;
+    }
+  }
+
+  if (!p.editable) {
+    if (!shiftV) return <></>;
+
+    return (
+      <PropEdit editable={false} label={p.label} value={fmtUnixDate(shiftV)} />
+    );
+  }
+
+  const value = dayjs(
+    shiftV && p.value! > 0 ? new Date(shiftV * 1000) : undefined
+  );
+
+  return (
+    <div style={{ margin: "10px auto" }}>
+      <LocalizationProvider dateAdapter={AdapterDayjs}>
+        <DatePicker
+          label={p.label}
+          value={value}
+          onChange={(v) => {
+            if (v && p.lastSecOfDay) {
+              v.set("hours", 23);
+              v.set("minutes", 59);
+              v.set("seconds", 59);
+            }
+            p.onChange?.(v ? v.unix() : undefined);
+          }}
+        />
+      </LocalizationProvider>
+    </div>
+  );
+}