Format the Date Using Ruby on Rails

Rails formatting date

Use

Model.created_at.strftime("%FT%T")

where,

%F - The ISO 8601 date format (%Y-%m-%d)
%T - 24-hour time (%H:%M:%S)

Following are some of the frequently used useful list of Date and Time formats that you could specify in strftime method:

Date (Year, Month, Day):
  %Y - Year with century (can be negative, 4 digits at least)
          -0001, 0000, 1995, 2009, 14292, etc.
  %C - year / 100 (round down.  20 in 2009)
  %y - year % 100 (00..99)

  %m - Month of the year, zero-padded (01..12)
          %_m  blank-padded ( 1..12)
          %-m  no-padded (1..12)
  %B - The full month name (``January'')
          %^B  uppercased (``JANUARY'')
  %b - The abbreviated month name (``Jan'')
          %^b  uppercased (``JAN'')
  %h - Equivalent to %b

  %d - Day of the month, zero-padded (01..31)
          %-d  no-padded (1..31)
  %e - Day of the month, blank-padded ( 1..31)

  %j - Day of the year (001..366)

Time (Hour, Minute, Second, Subsecond):
  %H - Hour of the day, 24-hour clock, zero-padded (00..23)
  %k - Hour of the day, 24-hour clock, blank-padded ( 0..23)
  %I - Hour of the day, 12-hour clock, zero-padded (01..12)
  %l - Hour of the day, 12-hour clock, blank-padded ( 1..12)
  %P - Meridian indicator, lowercase (``am'' or ``pm'')
  %p - Meridian indicator, uppercase (``AM'' or ``PM'')

  %M - Minute of the hour (00..59)

  %S - Second of the minute (00..59)

  %L - Millisecond of the second (000..999)
  %N - Fractional seconds digits, default is 9 digits (nanosecond)
          %3N  millisecond (3 digits)
          %6N  microsecond (6 digits)
          %9N  nanosecond (9 digits)
          %12N picosecond (12 digits)

For the complete list of formats for strftime method please visit APIDock

How to change date format from mm/dd/yyyy to dd/mm/yyyy Ruby on Rails

Two steps:

You need to convert your string into Date object. For that, use Date#strptime.
You can use Date#strftime to convert the Date object into preferred format.

See implementation below:

str = '01/14/2018'

date = Date.strptime(str, '%m/%d/%Y')
 => #<Date: 2018-01-14 ((2458133j,0s,0n),+0s,2299161j)>

date.strftime('%d-%m-%Y')
 => "14-01-2018"

date.strftime('%Y-%m-%d')
 => "2018-01-14"

Rails Date Format (To match YYYY-MM-DD HH-MM-SS)

Since this is a common thing to want, there is a shorthand method to do this.

DateTime.now.to_s(:db)     #=> 2015-07-31 22:22:05

http://api.rubyonrails.org/classes/DateTime.html#method-i-to_formatted_s

Set and Display Dates in rails via format: %m/%d/%Y

The best solution I have found is a two-step process:

Allow dates to save within the format of mm/dd/yyyy
Simply add in the american_date gem. And with that: when you enter into a text_field for a date the format of: mm/dd/yyyy (ex: 1/30/2016) it will save the correct date! This works wonderfully with the bootstrap-datepicker-rails gem because when you use the datepicker to pick a date: it loads into the textbox the date in this format.
Display dates in the format of mm/dd/yyyy
however, even with the american_date gem installed: rails still wants to display the date in the yyyy-mm-dd format.
Example: within a text_field, such as: <%= f.text_field :date %>, when the user goes back to edit that date, it will redisplay the date in the format of yyyy-mm-dd which is not what we want. We want rails to redisplay the date in the mm/dd/yyyy format.
Another Example: if you have an erb tag, such as <%= @blog.some_date %> then yet again: rails will display the date in the format of yyyy-mm-dd. Again: this is not what we want. We want that erb tag to automatically redisplay the date in the format of mm/dd/yyyy
To fix this: you have two options:
One option is to open up your config/locals/en.yml file and use the setup specified in the original question of this post. I personally do not like this setup because you then need to remember to use the l method everytime you want to display a date within your app.
The other option (which I like best) is to go to your config/initializers directory and make a new file. Name the file anything you want. I named the file date_display_format.rb. Then within there just put this line: Date::DATE_FORMATS[:default] = "%m/%d/%Y". Now: a date within your erb tags will display in the proper format, and when you go to edit your date attribute within a form: with the text box the date will display in the proper format as well.

Formatting Time and Date in Ruby on Rails

Looks like the problem is just a stray l at the beginning of your code.

This should work:

<%= post.created_at.strftime("Posted on %B %d, %Y at %H:%M") %>

Better yet would be to move this time formatting to a model and call that on post. And move "Posted on" outside the method. So:

<td> Posted on <%= post.formatted_created_on %> </td>

Formatting Date/Time in Ruby to YYYY-MM-DD HH:MM:SS

You can use the Time#strftime method to format the time into a variety of different formats, including the one which you need. It takes a parameter which specifies the format of the date output. Look at the documentation for this method for more instructions about how to use it.

Time.now.strftime("%F %T")

The %F specifies that we would like the date in YYYY-MM-DD format. This is followed by a space, then the %T specifier, which produces a HH:MM:SS time output.

To incorporate this into your code:

"erstellzeit": "#{Time.now.strftime("%F %T")}"

Alternatively, if you're getting an additional +0000 output, try:

"erstellzeit": "#{Time.now.strftime("%F %H:%M:%S")}"

How do I format datetime in rails?

Use ruby's strftime() on dates/datetimes:

<%= link_to timeslot.opening.strftime("%Y %m %d"), [@place, timeslot] %>

Have a look at the documentation to find out how the formatting works.

Formatting Date in Rails

In Rails 4 or above

> Date.today.beginning_of_month + 14
#=> Sun, 15 Oct 2017 
# formatted as per your requirement
> (Date.today.beginning_of_month + 14).strftime("%B %d, %Y")
#=> "October 15, 2017"

Date#beginning_of_month it will return you beginning date of month of specified date (which will be always 1st, add 14 days) so you will get 15th of that month