Ruby gem to provide details about Date and Time string format directives
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It's pronounced "strftime", not "strftime".

With strftime you'll have descriptions of time format directives at your fingertips in Ruby.

Strftime::Directive.all contains an array of these directive objects holding a key, description and example.

Just use Strftime::Directives['%M'] to get a description and example, or use the shorthand method strfd '%M'

Strftime::Directives['%M'].description #=> 'Minute of the hour'

This might be useful for you, or for users of a system which are able to specify string formats for dates and times.

How is that useful?

You want more? You got it. With strftime you'll have strfd available to your in your ruby and your terminal. What's that?

By running strfd "June 14 2011" you'll get a list of directives that you can use to format a time and get what you want.

Other projects try to give you information about time formatting by showing you all the options upfront and allowing you to decide. strftime goes the opposite way and tries to take your desired outcome and give you want you need to format it.


Add this line to your application's Gemfile:

gem 'strftime'

And then execute:

$ bundle

Or install it yourself as:

$ gem install strftime


After checking out the repo, run bin/setup to install dependencies. Then, run rake to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to


Bug reports and pull requests are welcome on GitHub at[USERNAME]/strftime. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Strftime project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.