North Mini Code (free)

<?php

namespace Drupal\date_display\Plugin\Block;

use Drupal\Core\Block\Attribute\Block;
use Drupal\Core\Block\BlockBase;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\Core\DateTime\DateTimeFormatter;

/**
 * Provides a Date Display block.
 */
#[Block(
  id: "date_display",
  admin_label: new TranslatableMarkup("Date Display"),
  category: new TranslatableMarkup("Date"),
)]
class DateDisplayBlock extends BlockBase {

  /**
   * {@inheritdoc}
   */
  public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
    $form = parent::buildConfigurationForm($form, $form_state);

    // Title setting
    $form['title'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Title'),
      '#description' => $this->t('Optional title to display above the date'),
      '#default_value' => $this->getSetting('title'),
    ];

    // Date format setting
    $form['format'] = [
      '#type' => 'textfield',
      '#title' => $this->t('Date format'),
      '#description' => $this->t('Enter a date format string (see <a href="https://www.php.net/manual/en/datetime.format.php">PHP date format</a>). Default is F j, Y (e.g., March 1, 2024).'),
      '#default_value' => $this->getSetting('format'),
      '#placeholder' => $this->t('F j, Y'),
    ];

    // Show full date setting
    $form['show_full_date'] = [
      '#type' => 'checkbox',
      '#title' => $this->t('Show full date (customization)'),
      '#description' => $this->t('When enabled, allows custom date customization for different display options'),
      '#default_value' => $this->getSetting('show_full_date') ?? false,
    ];

    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
    parent::submitConfigurationForm($form, $form_state);
    $values = $form_state->getValues();

    $this->configuration['title'] = $values['title'];
    $this->configuration['format'] = $values['format'];
    $this->configuration['show_full_date'] = $values['show_full_date'] ?? false;
  }

  /**
   * {@inheritdoc}
   */
  public function defaultConfiguration() {
    return [
      'title' => '',
      'format' => 'F j, Y',
      'show_full_date' => false,
    ];
  }

  /**
   * {@inheritdoc}
   */
  public function build() {
    $build = [];

    // Add title if configured
    if (!empty($this->getSetting('title'))) {
      $build['title'] = [
        '#type' => 'html_tag',
        '#tag' => 'h2',
        '#attributes' => ['class' => ['date-display-title']],
        '#value' => $this->getSetting('title'),
      ];
    }

    // Get current date
    $dateTimeFormatter = $this->getDateFormatter();
    $current_date = $dateTimeFormatter->format(time(), $this->getSetting('format'))
      ?: $dateTimeFormatter->format(time(), 'F j, Y');

    // Add date display
    $build['date'] = [
      '#type' => 'markup',
      '#markup' => '<div class="date-display-value">' . $current_date . '</div>',
      '#allowed_tags' => ['div'],
    ];

    // Add additional formatting options if enabled
    if ($this->getSetting('show_full_date')) {
      $build['additional_dates'] = [
        '#type' => 'container',
        '#attributes' => ['class' => ['date-display-additional']],
        '#children' => [
          $this->renderShortDate($dateTimeFormatter),
          $this->renderLongDate($dateTimeFormatter),
        ],
      ];
    }

    return $build;
  }

  /**
   * Render a short version of the date.
   */
  protected function renderShortDate(DateTimeFormatter $dateTimeFormatter) {
    $short_format = 'M j, Y';
    $current_date = $dateTimeFormatter->format(time(), $short_format);
    return [
      '#type' => 'html_tag',
      '#tag' => 'span',
      '#attributes' => ['class' => ['date-display-short']],
      '#value' => $this->t('Short: @date', ['@date' => $current_date]),
    ];
  }

  /**
   * Render a long version of the date.
   */
  protected function renderLongDate(DateTimeFormatter $dateTimeFormatter) {
    $long_format = 'l, F j, Y - g:i A';
    $current_date = $dateTimeFormatter->format(time(), $long_format);
    return [
      '#type' => 'html_tag',
      '#tag' => 'span',
      '#attributes' => ['class' => ['date-display-long']],
      '#value' => $this->t('Full: @date', ['@date' => $current_date]),
    ];
  }

}