Issue #2896507 by heddn, maxocub: Update FieldPluginBase with a default processFieldValues() and getFieldFormatterMap()

Issue #2847651 by murrow, rachel_norfolk, john@johncook.me.uk, mpdonadio, BarisW, droplet, tstoeckler, andrewmacpherson, prabhu9484, ok_lyndsey, benjifisher, yoroy, lauriii, martin107: Improve timezones selector with optgroups

Issue #2887118 by tacituseu: Superfluous argument in call to ::formatDate() in DateTimeDefaultFormatter

Issue #2486019 by mpdonadio, pfrenssen, webflo, michielnugter, maris.abols, ivanjaros, hauruck, MickeA, Jo Fitzgerald, mian3010, iMiksu: Wrong validation messages in Datelist::validateDatelist()

Issue #2824717 by mpdonadio, tedbow, Wim Leers, alexpott: Add a format constraint to DateTimeItem to provide REST error message

Issue #2865992 by tar_inet, Lendude, mpdonadio, Wim Leers: Convert Datetime module Views tests to Kerneltest

Issue #2566779 by quietone, hussainweb, keithm, heddn, kekkis, Shawn DeArmond, Jo Fitzgerald, mlbrgl, phenaproxima, mikeryan, 13jupiters, Gábor Hojtsy: Migration D6 > D8 of CCK date fields

Issue #2780063 by mpdonadio, Jo Fitzgerald, GoZ, boaloysius, klausi, Lendude: Convert web tests to browser tests for datetime and datetime_range modules

Issue #2854529 by alexpott, xjm, klausi, Chi, Mixologic: Fix Drupal.Scope.MethodScope - all methods should have scopes

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #1918994 by Tim Bozeman, mgifford, mpdonadio, vprocessor, sun, xjm, falcon03, nabiyllin, rteijeiro, cwarsaw, yoroy, andymartha, jessebeach, lauriii, jhedstrom, andypost, Bojhan, cilefen, aaronbauman, sugaroverflow: Improve Datetime and Daterange Widget accessibility

Issue #2775669 by jhedstrom, denutkarsh, xjm, mpdonadio: Clean up redundant methods in datetime field formatters

Issue #2843934 by mpdonadio, Gábor Hojtsy: datetime.schema.yml does not use the "built-in" date_format type

Issue #2502195 by vijaycs85, larowlan: \Drupal\Core\StringTranslation\Translator\CustomStrings should be serializable, but contain \Drupal\Core\Site\Settings which is not

Issue #2778083 by mpdonadio, YesCT: Default value for Date-Only fields is broken when UTC date is different than user current date

Issue #2786583 by claudiu.cristea, jhedstrom, effulgentsia: Create a base class for DateTimeFieldTest and DateRangeFieldTest and move common code into it

Issue #2572801 by alexpott, vprocessor, andriyun, andypost, chishah92, Mile23, attiks, hussainweb, klausi, dawehner, pfrenssen: Fix 'Drupal.WhiteSpace.ScopeIndent' coding standard

Issue #2561993 by jhedstrom, jonathanjfshaw, yoroy, emma.maria, mpdonadio: Better labelling for Date time form select elements

Issue #2719695 by alexpott, Mile23: Fix 'Drupal.Classes.ClassDeclaration.CloseBraceAfterBody' coding standard

Issue #2716685 by Mile23: Part 2: Fix several errors in the 'Drupal.Commenting.DocComment' coding standard

Issue #2716991 by mpdonadio: Incorrect ISO datetime attribute for date-only fields w/ default formatter

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2686407 by andypost, aerozeppelin, darrick, mpdonadio: Datetime type should be disabled on storage setting form if field has data

Issue #2672600 by borisson_, arunkumark, Mile23: Replace deprecated usage of  entity_create('node') with a direct call to Node::create() in comment,datetime,editor,field,hal,system,taxonomy,views

Issue #2669400 by jungle, dimaro, rakesh.gectcr, lluvigne, Mile23: Replace deprecated usages of entity_create('type') with a direct call to <EntityType>::create()

Issue #2641604 by Mac_Weber, lluvigne, heykarthikwithu: Replace deprecated usage of  entity_create('node_type') with a direct call to NodeType::create()

Issue #2641584 by Mac_Weber, heykarthikwithu, legovaer: Replace deprecated usage of  entity_create('field_config') with a direct call to FieldConfig::create()

Issue #2641586 by Mac_Weber, marvin_B8: Replace deprecated usage of  entity_create('field_storage_config') with a direct call to  FieldStorageConfig::create()