Ruby on Rails
Calendar Helper Plugin

Introduction
A single helper method that generates a CSS-styled calendar.

Originally written by Jeremy Voorhis.

Enhanced by Jarkko Laine.

Pluginized and test-driven by Geoffrey Grosenbach.

Sample here: http://rubyonrailsworkshops.com

Also includes a calendar_styles generator that copies a stylesheet to the public stylesheets directory.

svn: http://topfunky.net/svn/plugins/calendar_helper

• railsapp>ruby script/plugin install http://topfunky.net/svn/plugins/calendar_helper
• railsapp/vendor/plugins/calendar_helper>rake rdoc
  (Rakefile and windows problems here. See tihs link for workarounds)
• railsapp>ruby script/generate calendar_styles

• In a rhtml page:
  

  
  <%=calendar(:year => 2005, :month => 6)%>
  
  

• Issues
  If you have a controller named Calendar, you will get the error:
  undefined method `calendar' for . . .

• Styles
  To get the weekend background for a special day be a different color, add .weekendDay.specialDay to calendar/style.css:

Usage with Globalize plugin

i wanted to create calendars in my locale and i was already using Globalize, to make calendar_helper globalize aware i just added a couple things and to my surprise it worked well.

here is a patch for calendar_helper.rb

--- calendar_helper.original    2006-06-25 00:56:40.000000000 -0500
+++ calendar_helper.rb  2006-06-25 11:44:37.000000000 -0500
@@ -48,7 +48,19 @@
   # An additional 'weekend' class is applied to weekend days. 
   #
   # For consistency with the themes provided in the calendar_styles generator, use "specialDay" as the CSS class for marked days.
-  # 
+  # i
+
+       def daynames_t(abb)
+               days = []
+               Date::DAYNAMES.each {|d|
+                       if abb == (0..-1)
+                   days << "#{d} [weekday]".t(d)
+                       else
+                               days << "#{d.slice(abb)} [abbreviated weekday]".t(d.slice(abb))
+                       end
+         }
+               days
+       end
   def calendar(options = {}, &block)
     raise(ArgumentError, "No year given")  unless options.has_key?(:year)
     raise(ArgumentError, "No month given") unless options.has_key?(:month)
@@ -71,15 +83,16 @@

     first_weekday = first_day_of_week(options[:first_day_of_week])
     last_weekday = last_day_of_week(options[:first_day_of_week])
-    
-    day_names = Date::DAYNAMES.dup
+    day_names = daynames_t(options[:abbrev]) 
+    #day_names = Date::DAYNAMES.dup
+    month_name = "#{Date::MONTHNAMES[options[:month]]} [month]".t("#{Date::MONTHNAMES[options[:month]]}")
     first_weekday.times do
       day_names.push(day_names.shift)
     end

     cal = %(<table class="#{options[:table_class]}" border="0" cellspacing="0" cellpadding="0">) 
-    cal << %(<thead><tr class="#{options[:month_name_class]}"><th colspan="7">#{Date::MONTHNAMES[options[:month]]}</th></tr><tr class="#{options[:day_name_class]}">)
-    day_names.each {|d| cal << "<th>#{d[options[:abbrev]]}</th>"}
+    cal << %(<thead><tr class="#{options[:month_name_class]}"><th colspan="7">#{month_name}</th></tr><tr class="#{options[:day_name_class]}">)
+    day_names.each {|d| cal << "<th>#{d}</th>"}
     cal << "</tr></thead><tbody><tr>" 
     beginning_of_week(first, first_weekday).upto(first - 1) do |d|
       cal << %(<td class="#{options[:other_month_class]})

make sure you have correctly set a locale in the controller you are showing the calendar!!!