Count number of days between two dates

Question

How do I count the number of days between these two dates?

start_date = Date.parse \"2012-03-02 14:46:21 +0100\"
end_date =  Date.parse \"2012-04-02 14:46:21         


        

Answer 1

to get the number of days in a time range (just a count of all days)

(start_date..end_date).count
(start_date..end_date).to_a.size
#=> 32

to get the number of days between 2 dates

(start_date...end_date).count
(start_date...end_date).to_a.size
#=> 31

Answer 2

None of the previous answers (to this date) gives the correct difference in days between two dates.

The one that comes closest is by thatdankent. A full answer would convert to_i and then divide:

(Time.now.to_i - 23.hours.ago.to_i) / 86400
>> 0

(Time.now.to_i - 25.hours.ago.to_i) / 86400
>> 1

(Time.now.to_i - 1.day.ago.to_i) / 86400
>> 1

In the question's specific example, one should not parse to Date if the time passed is relevant. Use Time.parse instead.

Answer 3

With the Date (and DateTime) classes you can do (end_date - start_date).to_i to get the number of days difference.

Answer 4

I kept getting results in seconds, so this worked for me:

(Time.now - self.created_at) / 86400

Answer 5

Assuming that end_date and start_date are both of class ActiveSupport::TimeWithZone in Rails, then you can use:

(end_date.to_date - start_date.to_date).to_i

Answer 6

(end_date - start_date)/1000/60/60/24

any one have best practice please comment below