# Question on CRON **URL:** \ **Category:** Rails\ **Created:** [December 30, 2009, 4:36am UTC](https://www.ruby-forum.com/t/question-on-cron/180838 "2009-12-30T04:36:53Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![newb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/2acd7d/32.png) [@newb](https://www.ruby-forum.com/u/newb)\ **Post date:** [December 30, 2009, 4:36am UTC](https://www.ruby-forum.com/t/question-on-cron/180838/1 "2009-12-30T04:36:53Z")
Dear All, i m running cron task in my application using whenever gem. the below code runs the rake every month. every 1.month, :at =\> ‘11:55pm’ do but i want to run this rake on 1st date of every month. how can i do it. pls guide me on this. ---
**Author:** ![newb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/2acd7d/32.png) [@newb](https://www.ruby-forum.com/u/newb)\ **Post date:** [December 30, 2009, 6:55am UTC](https://www.ruby-forum.com/t/question-on-cron/180838/2 "2009-12-30T06:55:12Z")
Newb N. wrote: > Dear All, > i m running cron task in my application using whenever gem. > the below code runs the rake every month. > every 1.month, :at =\> ‘11:55pm’ do > but i want to run this rake on 1st date of every month. > how can i do it. > pls guide me on this. Some one pls help me ---
**Author:** ![newb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/2acd7d/32.png) [@newb](https://www.ruby-forum.com/u/newb)\ **Post date:** [December 30, 2009, 8:15am UTC](https://www.ruby-forum.com/t/question-on-cron/180838/3 "2009-12-30T08:15:43Z")
try : 55 11 01 \* \* regards On Wed, Dec 30, 2009 at 12:55 PM, Newb N. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > – > For more options, visit this group at > [http://groups.google.com/group/rubyonrails-talk?hl=en](http://groups.google.com/group/rubyonrails-talk?hl=en). – David A. Prasetya Ruby on Rails developer @ [http://kiranatama.com](http://kiranatama.com) - a Ruby on Rails outsourcing company – You received this message because you are subscribed to the Google Groups “Ruby on Rails: Talk” group. To post to this group, send email to removed\_email\_address@domain.invalid. To unsubscribe from this group, send email to removed\_email\_address@domain.invalid. For more options, visit this group at [http://groups.google.com/group/rubyonrails-talk?hl=en](http://groups.google.com/group/rubyonrails-talk?hl=en). ---
**Author:** ![newb](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/2acd7d/32.png) [@newb](https://www.ruby-forum.com/u/newb)\ **Post date:** [December 30, 2009, 10:36am UTC](https://www.ruby-forum.com/t/question-on-cron/180838/4 "2009-12-30T10:36:11Z")
On Dec 30, 2009, at 2:12 AM, David A. wrote: > try : 55 11 01 \* \* 55 23 1 \* \* … so you get 5 min. before midnight (not 5 min. before noon) > > but i want to run this rake on 1st date of every month. > > how can i do it. > > pls guide me on this. > > ## Some one pls help me > > – > David A. Prasetya > Ruby on Rails developer > @ [http://kiranatama.com](http://kiranatama.com) - a Ruby on Rails outsourcing company But to get the help that you seem to be asking for, you’ll have to give a bit more information. Ah! I overlooked the ‘whenever’ gem. Since I found that I have that gem installed (although I can’t recall when or why), the docs are really sparse and the code doesn’t seem to know how to cope with a time or frequency option that will do what you want. In particular, lib/outputs/cron.rb says that the :at option can’t be used in this case: every :month do command “something” end gives: @monthly something but trying to get what you want with: every :month, :at =\> ‘11:55pm’ do command “something” end or even: every :month do command “something”, :at =\> ‘11:55pm’ end appears to just give (from line 41): ArgumentError: comparison of Time with 0 failed although I would have expected (from line 42): You cannot specify an ‘:at’ when using the shortcuts for times. I can get this error if I try something like: every :month, :at =\> 1 do command “something” end or even: every :month do command “something”, :at =\> 1 end There seems to be a bug in lib/outputs/cron.rb:41 where @at \> 0 appears. The @at might be a 0, but is more likely a Time returned from Chronic.parse on line 11. Now, the particulars of using: every :month do … end to get a crontab line with: @monthly … might not be exactly what you want since (at least on Mac OS X) the man page says: string meaning * * * @monthly Run once a month, “0 0 1 \* \*”. Of course, that doesn’t really get you much closer to forcing: “55 23 1 \* \* …” I think that you might have to change the behavior in lib/outputs/ cron.rb to shift from the "@monthly " to the "0 0 1 \* \* " syntax when given :at, but also probably adjust the way that the job is created and stuffed into the @jobs hash. In the course of thinking about where and how to make the change which would permit one of the nice syntaxes above, I realized that you could say: every 1.month, :at =\> Time.parse(‘01 23:55’) do command ‘something’ end since the parse\_time function only looks at the #min, #hour, and #day methods of the given Time: 55 23 1 \* \* something It’s a feature of Time.parse to fill-in with parts of the current date/ time when bits are missing: Time.parse(‘01 23:55’) =\> Tue Dec 01 23:55:00 -0500 2009 -Rob Rob B. [http://agileconsultingllc.com](http://agileconsultingllc.com) removed\_email\_address@domain.invalid > **[Launch Scout Custom Software Development & Software Consulting](https://launchscout.com/)** > > We solve digital problems through custom software development and design for the web—apps, mobile, desktop and devices. removed\_email\_address@domain.invalid – You received this message because you are subscribed to the Google Groups “Ruby on Rails: Talk” group. To post to this group, send email to removed\_email\_address@domain.invalid. To unsubscribe from this group, send email to removed\_email\_address@domain.invalid. For more options, visit this group at [http://groups.google.com/group/rubyonrails-talk?hl=en](http://groups.google.com/group/rubyonrails-talk?hl=en).