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Calculate the Last Day of Month with Ruby

Posted by Jamal Nasir on February 7, 2012 at 3:45 AM

Date.new(Time.now.year, 12, 31)

The above line will create a date with the current year, 12 months and 31 days.

(12-Time.now.month)

This will subtract the current month number of month from 12. For example;

If it is Febuary (2), the above line of code will give you 10.

12-2=10

last_day_of_month= (Date.new(Time.now.year, 12, 31) << (12-Time.now.month)).day

So, the above line will give you the last day of month.

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1 Comment

Reply Rq Bukhari
4:00 AM on February 27, 2012 
Thank you so much for sharing this useful post. Keep sharing your knowledge with us.