ActiveSupport JSON #use_standard_json_time_format attribute use_standard_json_time_format Ruby on Rails 8.1.3.1 Since v8.1.3.1 Last seen in v8.1.3.1 If true, use ISO 8601 format for dates and times. Otherwise, fall back to the Active Support legacy format. On this page Support Bug Reports can be filed for the Ruby on Rails project on GitHub. Feature requests should be discussed on the rubyonrails-core forum. License Released under the MIT license.