How to add 10 days to current time in Rails

Question

I tried doing something like

Time.now + 5.days

but that doesn't work, even though I vaguely remember seeing, and being very impressed, with being able to do something like 2.years etc.

How do I do that in Rails 3?

It ahould work yes. As you're in rails, Time.zone.now sounds more appropriate — Ben, Mar 08 '18 at 07:50

score 308 · Accepted Answer · edited Mar 16 '16 at 17:49

308

Use

Time.now + 10.days

or even

10.days.from_now

Both definitely work. Are you sure you're in Rails and not just Ruby?

If you definitely are in Rails, where are you trying to run this from? Note that Active Support has to be loaded.

edited Mar 16 '16 at 17:49

the Tin Man

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answered Jan 11 '11 at 05:22

gunn

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@yuval it works on rails and not ruby..Think you have got it but just to help others – SemperFi Jan 28 '14 at 07:09
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There is a subtle difference. `Time.now + 10.days` always picks up your system timezone whereas `10.days.from_now` will pick up the UTC timezone if nothing is set in rails config. – Babistalikesflyingonrails Jan 28 '18 at 01:04
Generally, it's best to use [`Time.zone.now`](https://robots.thoughtbot.com/its-about-time-zones#a-summary-of-do39s-and-don39ts-with-time-zones) in place of `Time.now`. – x-yuri Aug 08 '18 at 20:44

score 24 · Answer 2 · edited Mar 16 '16 at 17:50

24

days, years, etc., are part of Active Support, So this won't work in irb, but it should work in rails console.

edited Mar 16 '16 at 17:50

the Tin Man

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answered Jan 11 '11 at 05:23

Jonathan Julian

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yeup - spot on. can't do this in vanilla ruby. – Yuval Karmi Jan 11 '11 at 05:24
2

Works in irb as well. If you have the gem installed, just do a `require 'active_support/time'` at the beginning of the session or before you use it's commands – darkdefender27 Jun 20 '18 at 10:51

score 12 · Answer 3 · edited Jun 20 '17 at 18:26

Some other options, just for reference

-10.days.ago
# Available in Rails 4
DateTime.now.days_ago(-10)

Just list out all options I know:

[1] Time.now + 10.days
[2] 10.days.from_now
[3] -10.days.ago
[4] DateTime.now.days_ago(-10)
[5] Date.today + 10

So now, what is the difference between them if we care about the timezone:

[1, 4] With system timezone
[2, 3] With config timezone of your Rails app
[5] Date only no time included in result

score 12 · Answer 4 · edited Feb 02 '21 at 19:30

12

This definitely works and I use this wherever I need to add days to the current date:

Date.today + 5

edited Feb 02 '21 at 19:30

Sebastián Palma

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answered May 26 '11 at 05:12

dj kaori

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Rahul Patel · Answer 5 · 2017-06-26T12:01:49.880

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Try this on Rails

Time.new + 10.days

Try this on Ruby

require 'date'
DateTime.now.next_day(10).to_time

edited Jun 26 '17 at 12:01

answered Jun 26 '17 at 11:52

Rahul Patel

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score 4 · Answer 6 · answered Mar 08 '18 at 07:42

4

Try this on Ruby. It will return a new date/time the specified number of days in the future

DateTime.now.days_since(10)

answered Mar 08 '18 at 07:42

Ramyani

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score 0 · Answer 7 · answered Dec 13 '22 at 10:17

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Little bit difference between:

Time.now + 10.days

3.0.1 :003 > Date.today + 1.day => Wed, 14 Dec 2022

or even

10.days.from_now

3.0.1 :002 > 1.day.from_now => 2022-12-14 15:49:57.35305172 +0600

answered Dec 13 '22 at 10:17

Pema Namgay

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How to add 10 days to current time in Rails

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