CODEWITHSUNDEEP
rubytimetimezone
Galet
Galet

Reputation: 6289

How to convert time with timezone in ruby

I want to convert time by passing time with timezone for conversion.

Writing a single method which convert time with timezone.

Time.now + Time.zone_offset("PST")

Will it work ?

i need a method in ruby.

Upvotes: 1

Views: 10255

Answers (4)

Matt Johnson-Pint
Matt Johnson-Pint

Reputation: 241525

"PST" only represents the part of the Pacific time zone that falls into Pacific Standard Time. To fully represent the time zone, you must consider Pacific Daylight Time also.

To do this in Ruby, you should use the tzinfo gem, as follows:

require 'tzinfo'
tz = TZInfo::Timezone.get('America/Los_Angeles')
now = tz.now

See also "Time Zone != Offset" in the timezone tag wiki.

Upvotes: 4

Gagan Gami
Gagan Gami

Reputation: 10251

Have a look at in_time_zone

 > Time.zone = 'Hawaii'  
 => "Hawaii" 
 > DateTime.now.in_time_zone 
 => Mon, 03 Nov 2014 04:00:29 HST -10:00   # UTC-10:00
 > DateTime.now
 => Mon, 03 Nov 2014 19:30:41 +0530  # UTC+05:30
 > Time.zone = "Eastern Time (US & Canada)"
 => "Eastern Time (US & Canada)" 
 > DateTime.now.in_time_zone
 => Mon, 03 Nov 2014 09:03:34 EST -05:00

Upvotes: 1

Arup Rakshit
Arup Rakshit

Reputation: 118271

No direct method is present. But you can solve it as

>> a = %w(%Y %m %d %H %M %S)
=> ["%Y", "%m", "%d", "%H", "%M", "%S"]
>> tm = Time.now
=> 2014-11-03 17:46:02 +0530
>> a.map { |s| tm.strftime(s) }
=> ["2014", "11", "03", "17", "46", "02"]
>> a.map! { |s| tm.strftime(s).to_i }
=> [2014, 11, 3, 17, 46, 2]
>> Time.new(*a, Time.zone_offset('PST'))
=> 2014-11-03 17:46:02 -0800

Look at the new(year, month=nil, day=nil, hour=nil, min=nil, sec=nil, utc_offset=nil) → time documentation. utc_offset for PST is -08:00.

Upvotes: 0

Surya
Surya

Reputation: 16002

There's no method for that, however you can make one for yourself:

class Time
  require 'time'
  def self.by_offset(offset)
    at(now + zone_offset(offset))
  end
end

Now, you can:

Time.by_offset('PST')
#=> 2014-11-03 10:11:14 +0530
Time.now
#=> 2014-11-03 18:11:13 +0530

Tested with 1.9.2, 2.0.0, and 2.1.2 Rubies(MRI).

Upvotes: 3

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