Issue #3420981 by kim.pepper, quietone, mstrelan, Berdir, alexpott: Convert FieldType plugin discovery to attributes

Issue #2827055 by yash.rode, srishtiiee, mrshowerman, rodrigoaguilera, herved, omkar.podey, MegaChriz, Lukas von Blarer, ravi.shankar, lauriii, c_archer, ifrik, froboy, Rudi Teschner, smustgrave, liquidcms, catch, quietone, mpdonadio, alexpott: Add option to show only start or end date in the DateTime Range custom formatter

Revert "Issue #2827055 by yash.rode, srishtiiee, mrshowerman, rodrigoaguilera, herved, omkar.podey, MegaChriz, Lukas von Blarer, ravi.shankar, lauriii, c_archer, ifrik, Rudi Teschner, froboy, smustgrave, liquidcms, quietone, mpdonadio: Add option to show only start or end date in the DateTime Range custom formatter"

This reverts commit b5c2ffc9.

Issue #2827055 by yash.rode, srishtiiee, mrshowerman, rodrigoaguilera, herved, omkar.podey, MegaChriz, Lukas von Blarer, ravi.shankar, lauriii, c_archer, ifrik, Rudi Teschner, froboy, smustgrave, liquidcms, quietone, mpdonadio: Add option to show only start or end date in the DateTime Range custom formatter

Issue #3112295 by mondrake, Taran2L, acbramley, cliddell, mpdonadio, smustgrave, Hardik_Patel_12, AkashKumar07, ravi.shankar, alexpott, andypost, daffie, JeroenT, vladbo, pifagor, voleger: Replace REQUEST_TIME in rest of OO code (except for tests)

Issue #3401464 by anushrikumari, sime, shweta__sharma, lauriii, ankithashetty, sijumpk, rkoller: Date range should be in the date_time category

Issue #3222251 by bbrala, longwave: [November 8, 2021] Replace all isset constructs with the null coalescing operator

Issue #3155770 by Hardik_Patel_12, naresh_bavaskar: Parent class implements ContainerFactoryPluginInterface, so it's not necessary for its child classes to repeat that they do as well

Revert "Issue #3112295 by mpdonadio, Hardik_Patel_12, daffie, JeroenT, Vlad Bo, pifagor, voleger, alexpott: Replace REQUEST_TIME in OO code w/o access to the container"

This reverts commit d23b4cc8.

Issue #3112295 by mpdonadio, Hardik_Patel_12, daffie, JeroenT, Vlad Bo, pifagor, voleger, alexpott: Replace REQUEST_TIME in OO code w/o access to the container

Issue #3009377 by kim.pepper, andypost, Berdir, alexpott, Wim Leers, mpdonadio, acbramley, larowlan, catch, xjm: Replace drupal_get_user_timezone with a date_default_timezone_get() and an event listener

Issue #2826404 by mpdonadio, Jo Fitzgerald, jhedstrom, larowlan: Create DateTimeItemInterface and deprecate global constants in datetime.module

Issue #2830094 by mpdonadio, Yogesh Pawar, arunkumark, jhedstrom, larowlan, alexpott: Deprecate and remove usages of datetime_date_default_time()

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

Issue #2858625 by mpdonadio: Daterange formatters should use $date->getTimestamp() instead of $date->format('U')

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 #2796145 by mpdonadio, kunal.kursija, Gábor Hojtsy, jhedstrom, hass: Daterange field labels not specific enough

Issue #2811725 by mpdonadio, paulanders, jhedstrom: Error when render Datetime Range field: Error: Unsupported operand types

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

Issue #2161337 by mpdonadio, darrick, swentel, effulgentsia, YesCT, xjm, Berdir, tim.plunkett, pguillard, SKAUGHT, sylus, jonathanjfshaw, FluxSauce, DuneBL, jhedstrom, dawehner, generalredneck, pjonckiere, borisson_, Gábor Hojtsy, webchick, miwayha: Add a Date Range field type with support for end date