Invalid date format specification in gemspec

Question

I am getting the following error when I try to use gems in windows, and I also referred to this stackoverflow post and updated rubygems and rails. But nothing could solve t

Answer 1

I have fixed this issue by upgrading my RubyGems to 1.8.10 with

gem update --system

Edit: You can also try (as suggested by ZeissS)

gem install rubygems-update
update_rubygems