Install local-time

Gemfile

@@ -8,6 +8,7 @@ gem "importmap-rails"
 gem "propshaft"
 gem "stimulus-rails"
 gem "turbo-rails"
+gem "local_time"
 
 # Deployment and drivers
 gem "bootsnap", require: false

Gemfile.lock

@@ -145,6 +145,7 @@ GEM
       reline (>= 0.4.2)
     json (2.7.2)
     language_server-protocol (3.17.0.3)
+    local_time (3.0.2)
     logger (1.6.1)
     loofah (2.22.0)
       crass (~> 1.0.2)
@@ -326,6 +327,7 @@ DEPENDENCIES
   capybara
   debug
   importmap-rails
+  local_time
   propshaft
   puma (>= 5.0)
   rails!

app/javascript/application.js

@@ -1,3 +1,4 @@
 // Configure your import map in config/importmap.rb. Read more: https://github.com/rails/importmap-rails
 import "@hotwired/turbo-rails"
+import "initializers"
 import "controllers"

app/javascript/initializers/index.js

@@ -0,0 +1 @@
+import "initializers/local_time"

app/javascript/initializers/local_time.js

@@ -0,0 +1,2 @@
+import LocalTime from "local-time"
+LocalTime.start()

config/importmap.rb

@@ -4,6 +4,8 @@ pin "application"
 pin "@hotwired/turbo-rails", to: "turbo.min.js"
 pin "@hotwired/stimulus", to: "stimulus.min.js"
 pin "@hotwired/stimulus-loading", to: "stimulus-loading.js"
+pin "local-time" # @3.0.2
 
+pin_all_from "app/javascript/initializers", under: "initializers"
 pin_all_from "app/javascript/controllers", under: "controllers"
 pin_all_from "app/javascript/helpers", under: "helpers"