Updated based on feedback (incompleted)

docs/en/02_Developer_Guides/03_Forms/01_Validation.md

@@ -66,12 +66,7 @@ Each individual [api:FormField] instance is responsible for validating the submi
 
 Subclasses of `FormField` can define their own version of `validate` to provide custom validation rules such as the 
 above example with the `Email` validation. The `validate` method on `FormField` takes a single argument of the current 
-`Validator` instance. 
-
-<div class="notice" markdown="1">
-The data value of the `FormField` submitted is not passed into validate. It is stored in the `value` property through 
-the `setValue` method.
-</div>
+`Validator` instance.
 
 ```php
 public function validate($validator)

docs/en/02_Developer_Guides/03_Forms/Field_types/02_DateField.md

@@ -3,8 +3,8 @@ summary: How to format and use the DateField class.
 
 # DateField
 
-This `FormField` subclass lets you display an editable date, either in a single text input field, or in three separate 
-fields for day, month and year. It also provides a calendar date picker.
+This `FormField` subclass lets you display an editable date, in a single text input field.
+It also provides a calendar date picker.
 
 The following example will add a simple DateField to your Page, allowing you to enter a date manually. 
 
@@ -33,14 +33,14 @@ The following example will add a simple DateField to your Page, allowing you to
 
 ## Custom Date Format
 
-A custom date format for a [api:DateField] can be provided through `setConfig`.
+A custom date format for a [api:DateField] can be provided through `setDateFormat`.
 
 	:::php
 	// will display a date in the following format: 31-06-2012
 	DateField::create('MyDate')->setDateFormat('dd-MM-yyyy'); 
 
 <div class="info" markdown="1">
-The formats are based on [Zend_Date constants](http://framework.zend.com/manual/1.12/en/zend.date.constants.html).
+The formats are based on [CLDR format](http://userguide.icu-project.org/formatparse/datetime).
 </div>
 
 
@@ -51,19 +51,16 @@ strtotime()).
 
 	:::php
 	DateField::create('MyDate')
-		->setConfig('min', '-7 days')
-		->setConfig('max', '2012-12-31')
+		->setMinDate('-7 days')
+		->setMaxDate'2012-12-31')
 		
 ## Separate Day / Month / Year Fields
 
-The following setting will display your DateField as three input fields for day, month and year separately. HTML5 
-placeholders 'day', 'month' and 'year' are enabled by default. 
+To display separate input fields for day, month and year separately you can use the `DateFieldSeparated` subclass`.
+HTML5 placeholders 'day', 'month' and 'year' are enabled by default. 
 
 	:::php
-	DateField::create('MyDate')
-		->setConfig('dmyfields', true)
-		->setConfig('dmyseparator', '/') // set the separator
-		->setConfig('dmyplaceholders', 'true'); // enable HTML 5 Placeholders
+	DateFieldSeparated::create('MyDate');
 
 <div class="alert" markdown="1">
 Any custom date format settings will be ignored. 
@@ -75,10 +72,13 @@ The following setting will add a Calendar to a single DateField, using the jQuer
 
 	:::php
 	DateField::create('MyDate')
-		->setConfig('showcalendar', true);
+		->setShowCalendar(true);
+
+The jQuery date picker will support most custom locale formats (if left as default).
+If setting an explicit date format via setDateFormat() then the below table of supported
+characters should be used.
 
-The jQuery DatePicker doesn't support every constant available for `Zend_Date`. If you choose to use the calendar, the 
-following constants should at least be safe:
+It is recommended to use numeric format, as `MMM` or `MMMM` month names may not always pass validation.
 
 Constant | xxxxx
 -------- | -----
@@ -94,15 +94,6 @@ y        | year (4 digits)
 yy       | year (2 digits)
 yyyy     | year (4 digits)
 
-Unfortunately the day- and monthname values in Zend Date do not always match those in the existing jQuery UI locale 
-files, so constants like `EEE` or `MMM`, for day and month names could break validation. To fix this we had to slightly 
-alter the jQuery locale files, situated in */framework/thirdparty/jquery-ui/datepicker/i18n/*, to match Zend_Date. 
-
-<div class="info">
-At this moment not all locale files may be present. If a locale file is missing, the DatePicker calendar will fallback 
-to 'yyyy-MM-dd' whenever day - and/or monthnames are used. After saving, the correct format will be displayed.  
-</div>
-
 ## Formatting Hints
 
 It's often not immediate apparent which format a field accepts, and showing the technical format (e.g. `HH:mm:ss`) is 
@@ -113,13 +104,14 @@ field description as an example.
 	$dateField = DateField::create('MyDate');
 
 	// Show long format as text below the field
-	$dateField->setDescription(sprintf(
-		_t('FormField.Example', 'e.g. %s', 'Example format'),
-		Convert::raw2xml(Zend_Date::now()->toString($dateField->getConfig('dateformat')))
+	$dateField->setDescription(_t(
+	    'FormField.Example',
+	     'e.g. {format}',
+	     [ 'format' =>  $dateField->getDateFormat() ]
 	));
 
 	// Alternatively, set short format as a placeholder in the field
-	$dateField->setAttribute('placeholder', $dateField->getConfig('dateformat'));
+	$dateField->setAttribute('placeholder', $dateField->getDateFormat());
 
 <div class="notice" markdown="1">
 Fields scaffolded through [api:DataObject::scaffoldCMSFields()] automatically have a description attached to them.

docs/en/04_Changelogs/4.0.0.md

@@ -942,6 +942,9 @@ specific functions.
   by the array key, or the `class` parameter value.
 * Uniqueness checks for `File.Name` is performed on write only (not in `setName()`)
 * Created `Resettable` interface to better declare objects which should be reset between tests.
+* Added a server requirement for the php-intl extension (shipped by default with most PHP distributions)
+* Replaced Zend_Date and Zend_Locale with the php-intl extension.
+* Consistently use CLDR date formats (rather than a mix of CLDR and date() formats)
 
 #### <a name="overview-general-removed"></a>General and Core Removed API
 
@@ -1052,17 +1055,21 @@ A very small number of methods were chosen for deprecation, and will be removed
 * `ChangeSet` and `ChangeSetItem` have been added for batch publishing of versioned dataobjects.
 * `DataObject.table_name` config can now be used to customise the database table for any record.
 * `DataObjectSchema` class added to assist with mapping between classes and tables.
-* `DBMoney` values are now treated as empty only Amount is null. Values without Currency
-  will be formatted in the default locale.
+* `DBMoney` values are now treated as empty only if `Amount` field is null. If an `Amount` value
+  is provided without a `Currency` specified, it will be formatted as per the current locale.
 
 The below methods have been added or had their functionality updated to `DBDate`, `DBTime` and `DBDatetime`
 * `getTimestamp()` added to get the respective date / time as unix timestamp (seconds since 1970-01-01)
-* `Format()` method now use CLDR format strings, rather than PHP format strings.
-  See http://userguide.icu-project.org/formatparse/datetime.
+* `Format()` method now use [CLDR format strings](http://userguide.icu-project.org/formatparse/datetime),
+  rather than [PHP format string](http://php.net/manual/en/function.date.php).
+  E.g. `d/m/Y H:i:s` (php format) should be replaced with to `dd/MM/y HH:mm:ss` (CLDR format).
 * getISOFormat() added which returns the standard date/time ISO 8601 pattern in CLDR format.
-* Dates passed in m/d/y format will now raise a notice but will be parsed.
-  Dates passed to constructors should follow ISO 8601 (y-m-d).
-* 2-digit years will raise a notice.
+* `setValue` method is now a lot more restrictive, and expects dates and times to be passed in
+  ISO 8601 format (y-MM-dd) or (HH:mm:ss). Certain date formats will attempt to parse with
+  the below restrictions:
+  - Dates passed in with leading months (MM/dd/y format) will now raise a notice but will be parsed.
+    Dates passed to constructors should follow ISO 8601 (y-MM-dd).
+  - 2-digit years will raise a notice, since they are ambiguous without additional formatting hints.
 * `FormatFromSettings` will default to `Nice()` format if no member is logged in.
 * `Nice`, `Long` and `Full` methods will now follow standard formatting rules for the
   current locale, rather than pre-defined formats.
@@ -1071,7 +1078,6 @@ The below methods have been added or had their functionality updated to `DBDate`
 
 `DBTime` specific changes:
 * Added `DBTime::FormatFromSettings`
-* Added `DBTime::Nice12`
 
 #### <a name="overview-orm-removed"></a>ORM Removed API
 
@@ -1115,7 +1121,9 @@ The below methods have been added or had their functionality updated to `DBDate`
   - `days_between`
 * `nice_format` has been removed from `DBDate` / `DBTime` / `DBDatetime` has been removed in favour of
   locale-specific formatting for Nice()
-* Removed `DBTime::TwelveHour`
+* Removed several `DBTime` methods:
+  - `TwelveHour`
+  - `Nice24`
 * Removed some `DBMoney` methods due to lack of support in php-intl.
   - `NiceWithShortname`
   - `NiceWithName`
@@ -1235,6 +1243,9 @@ The following filesystem synchronisation methods and tasks are also removed
 * Introduced `AssetAdmin\Forms\UploadField` as a react-friendly version of UploadField. This may also
   be used in normal entwine forms for managing files in a similar way to UploadField. However, this
   does not support inline editing of files.
+* Added method `FormField::setSubmittedValue($value, $data)` to process input submitted from form
+  submission, in contrast to `FormField::setValue($value, $data)` which is intended to load its
+  value from the ORM. The second argument to setValue() has been added.
 
 The following methods and properties on `Requirements_Backend` have been renamed:
 
@@ -1320,6 +1331,7 @@ New `DatetimeField` methods replace `getConfig()` / `setConfig()`:
 * `getTimezone()` / `setTimezone()`
 * `getDateTimeOrder()` / `setDateTimeOrder()`
 * `getLocale()` / `setLocale()`
+* `datavaluefield` config is removed as internal data value is now fixed to ISO 8601 format
 
 New `DateField` methods replace `getConfig()` / `setConfig()`:
 
@@ -1328,9 +1340,9 @@ New `DateField` methods replace `getConfig()` / `setConfig()`:
 * `getMinDate()` / `setMinDate()`
 * `getMaxDate()` / `setMaxDate()`
 * `getPlaceholders()` / `setPlaceholders()`
-* `getSeparateDMYFields()` / `setSeparateDMYFields()`
 * `getClientLocale` / `setClientLocale`
 * `getLocale()` / `setLocale()`
+* option `dmyfields` is now superceded with an `DateFieldSeparated` class
 
 New `TimeField` methods replace `getConfig()` / `setConfig()`
 
@@ -1383,20 +1395,20 @@ New `TimeField` methods replace `getConfig()` / `setConfig()`
   for all DataObject subclasses, rather than just the basename without namespace.
 * i18n key for locale-respective pluralisation rules added as '.PLURALS'. These can be configured
   within yaml in array format as per [ruby i18n pluralization rules](http://guides.rubyonrails.org/i18n.html#pluralization).
-* `i18n.all_locales` config moved to `Locales.locales`
-* `i18n.common_languages` config moved to `Locales.languages`
-* `i18n.likely_subtags` config moved to `Locales.likely_subtags`
-* `i18n.tinymce_lang` config moved to `TinyMCEConfig.tinymce_lang`
-* `i18n::get_tinymce_lang()` moved to `TinyMCEConfig::get_tinymce_lang()`
-* `i18n::get_locale_from_lang()` moved to `Locales::localeFromLang()`
-* `i18n::get_lange_from_locale()` moved to `Locales::langFromLocale()`
-* `i18n::validate_locale()` moved to `Locales::validate()`
-* `i18n::get_common_languages()` moved to `Locales::getLanguages()`
-* `i18n::get_locale_name()` moved to `Locales::localeName()`
-* `i18n::get_language_name()` moved to `Locales::languageName()`
-* `i18n.module_priority` config moved to `Sources.module_priority`
-* `i18n::get_owner_module()` moved to `ClassManifest::getOwnerModule()`
-* `i18n::get_existing_translations()` moved to `Sources::getKnownLocales()`
+* `i18n.all_locales` config moved to `SilverStripe\i18n\Data\Locales.locales`
+* `i18n.common_languages` config moved to `SilverStripe\i18n\Data\Locales.languages`
+* `i18n.likely_subtags` config moved to `SilverStripe\i18n\Data\Locales.likely_subtags`
+* `i18n.tinymce_lang` config moved to `SilverStripe\Forms\HTMLEditor\TinyMCEConfig.tinymce_lang`
+* `i18n::get_tinymce_lang()` moved to `SilverStripe\Forms\HTMLEditor\TinyMCEConfig::get_tinymce_lang()`
+* `i18n::get_locale_from_lang()` moved to `SilverStripe\i18n\Data\Locales::localeFromLang()`
+* `i18n::get_lange_from_locale()` moved to `SilverStripe\i18n\Data\Locales::langFromLocale()`
+* `i18n::validate_locale()` moved to `SilverStripe\i18n\Data\Locales::validate()`
+* `i18n::get_common_languages()` moved to `SilverStripe\i18n\Data\Locales::getLanguages()`
+* `i18n::get_locale_name()` moved to `SilverStripe\i18n\Data\Locales::localeName()`
+* `i18n::get_language_name()` moved to `SilverStripe\i18n\Data\Locales::languageName()`
+* `i18n.module_priority` config moved to `SilverStripe\i18n\Data\Sources.module_priority`
+* `i18n::get_owner_module()` moved to `SilverStripe\Core\Manifest\ClassManifest::getOwnerModule()`
+* `i18n::get_existing_translations()` moved to `SilverStripe\i18n\Data\Sources::getKnownLocales()`
 
 #### <a name="overview-i18n-removed"></a>i18n API Removed API