[IMP] web: datetime new format and numeric attribute

closes odoo/documentation#14179

Related: odoo/odoo#218387
Related: odoo/enterprise#89968
Related: odoo/upgrade#8043
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

content/applications/studio/fields.rst

@@ -550,13 +550,17 @@ widget set, some specific properties are available:
   :guilabel:`Decade`. If no value is selected, the user can navigate the date selector by decade.
 - :guilabel:`Warning for future dates`: Enable this property to display a warning icon if a future
   date is selected.
-- :guilabel:`Condensed display`: Enable this property to show days, months and hours with no leading
-  zeros, e.g., `4/2/2025 8:05:00` instead of `04/02/2025 08:05:00`.
+- :guilabel:`Date format`: By default the date will be shown as `Apr 2, 2025, 08:05 AM`.
+  Enable this property to show the date in the format `4/2/2025 08:05:00`.
+  The numeric mode is the format set on the current language. In this mode the seconds are always
+  shown.
+- :guilabel:`Show date`: This property is enabled by default for :guilabel:`Date & Time` fields.
+  Disable this property to show only the time.
 - :guilabel:`Show time`: This property is enabled by default for :guilabel:`Date & Time` fields. On
   a read-only field, disable the property to show only the date. This can keep a list view less
   cluttered, for example.
-- :guilabel:`Show seconds`: This property is enabled by default for :guilabel:`Date & Time` fields.
-  Disable the property to show only hours and minutes.
+- :guilabel:`Show seconds`: This property is disabled by default for :guilabel:`Date & Time` fields.
+  Enable the property to show the seconds.
 - :guilabel:`Time interval`: Enter a value to determine the minute intervals shown in the time
   selector. For example, enter 15 to allow quarter-hour intervals. The default value is set to 5
   minutes.

content/developer/reference/frontend/javascript_reference.rst

@@ -667,6 +667,9 @@ Char (`char`)
 Date (`date`)
     This is the default field type for fields of type `date`. It consists of a text
     box and a date picker.
+    The field will show the date in a readable format like this: `Dec 19, 1997`.
+    The year will be hidden if it's the current one. When editing the field, the numeric format
+    will be shown. This format corresponds to the one set in the current language.
 
     - Supported field types: `date`
 
@@ -680,17 +683,26 @@ Date (`date`)
 
             <field name="datefield" options="{'min_date': 'today', 'max_date': '2023-12-31'}" />
 
-    - warn_future: displays a warning if the value is in the future (based on today).
+    - `warn_future`: displays a warning if the value is in the future (based on today).
 
         .. code-block:: xml
 
             <field name="datefield" options="{'warn_future': true}" />
 
+    - `numeric`: when set to true, it shows the date in the format set on the current language.
+      (default: `false`).
+
+        .. code-block:: xml
+
+            <field name="datefield" options="{'numeric': true}" />
+
 .. _reference/javascript_reference/datetime_field:
 
 Date & Time (`datetime`)
     This is the default field type for fields of type `datetime`. The values are always
-    in the client's timezone.
+    in the client's timezone. The displayed format has the same behaviour as the date
+    field, see :ref:`Date Field <reference/javascript_reference/date_field>` description.
+    The readable format looks like this: `Dec 19, 1997, 10:45 AM`.
 
     - Supported field types: `datetime`
 
@@ -706,13 +718,13 @@ Date & Time (`datetime`)
 
             <field name="datetimefield" options="{'rounding': 10}" />
 
-    - `show_seconds`: when set to false, it hides the seconds from the datetime field.
-      The field will still accept datetime values, but the seconds will be hidden in
-      the UI (default: `true`).
+    - `show_seconds`: when set to true, it shows the seconds from the datetime field.
+      The field will still accept datetime values, but the seconds will be shown in
+      the UI (default: `false`).
 
         .. code-block:: xml
 
-            <field name="datetimefield" widget="datetime" options="{'show_seconds': false}" />
+            <field name="datetimefield" widget="datetime" options="{'show_seconds': true}" />
 
     - `show_time`: when set to false, it hides the time part from the datetime field.
       The field will still accept datetime values, but the time part will be hidden in
@@ -722,6 +734,14 @@ Date & Time (`datetime`)
 
             <field name="datetimefield" widget="datetime" options="{'show_time': false}" />
 
+    - `show_date`: when set to false, it hides the date part from the datetime field.
+      The field will still accept datetime values, but the date part will be hidden in
+      the UI (default: `true`).
+
+        .. code-block:: xml
+
+            <field name="datetimefield" widget="datetime" options="{'show_date': false}" />
+
 Date Range (`daterange`)
     This widget allows the user to select start and end date from a single picker.