Can’t preselect time zone in hook_form_alter

I’m writing a custom installation profile/distribution and I want to pre-populate some fields in the ‘Configure Site’ form (/core/install.php). I have managed to prefill/preselect other fields like (Site name, Site email address and Default country) but cannot preselect the Default time zone field. This is the code I am using:

function mydistribution_form_install_configure_form_alter(&$form, FormStateInterface $form_state) {   $form['site_information']['site_name']['#default_value'] = 'Dummy Site Name';   $form['site_information']['site_mail']['#default_value'] = 'example@example.com';      $form['regional_settings']['site_default_country']['#default_value'] = 'DE';   $form['regional_settings']['date_default_timezone']['#default_value'] = 'Europe/Berlin'; } 

As you can see in the screenshot, I manage to change the Default country successfully, but not the Default time zone.

The "strange" thing though is that when I inspect the code, I can see that the correct timezone has been selected but the form displays London.

enter image description here

I’m based in the UK so I guess this is how London gets selected.

Does anyone know how to get this fixed? Thank you in advance!

This article was republished from its original source.
Call Us: 1(800)730-2416

Pixeldust is a 20-year-old web development agency specializing in Drupal and WordPress and working with clients all over the country. With our best in class capabilities, we work with small businesses and fortune 500 companies alike. Give us a call at 1(800)730-2416 and let’s talk about your project.

FREE Drupal SEO Audit

Test your site below to see which issues need to be fixed. We will fix them and optimize your Drupal site 100% for Google and Bing. (Allow 30-60 seconds to gather data.)

Powered by

Can’t preselect time zone in hook_form_alter

On-Site Drupal SEO Master Setup

We make sure your site is 100% optimized (and stays that way) for the best SEO results.

With Pixeldust On-site (or On-page) SEO we make changes to your site’s structure and performance to make it easier for search engines to see and understand your site’s content. Search engines use algorithms to rank sites by degrees of relevance. Our on-site optimization ensures your site is configured to provide information in a way that meets Google and Bing standards for optimal indexing.

This service includes:

  • Pathauto install and configuration for SEO-friendly URLs.
  • Meta Tags install and configuration with dynamic tokens for meta titles and descriptions for all content types.
  • Install and fix all issues on the SEO checklist module.
  • Install and configure XML sitemap module and submit sitemaps.
  • Install and configure Google Analytics Module.
  • Install and configure Yoast.
  • Install and configure the Advanced Aggregation module to improve performance by minifying and merging CSS and JS.
  • Install and configure Schema.org Metatag.
  • Configure robots.txt.
  • Google Search Console setup snd configuration.
  • Find & Fix H1 tags.
  • Find and fix duplicate/missing meta descriptions.
  • Find and fix duplicate title tags.
  • Improve title, meta tags, and site descriptions.
  • Optimize images for better search engine optimization. Automate where possible.
  • Find and fix the missing alt and title tag for all images. Automate where possible.
  • The project takes 1 week to complete.