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https://stackoverflow.com/questions/238684/subtract-n-hours-from-a-datetime-in-ruby
36. You can just subtract less than one whole day: two_hours_ago = DateTime.now - (2/24.0) This works for minutes and anything else too: hours = 10minutes = 5seconds = 64hours = DateTime.now - (hours/24.0) #<DateTime: 2015-03-11T07:27:17+02:00 ((2457093j,19637s,608393383n),+7200s,2299161j)>minutes = DateTime.now - (minutes/1440.0) …
https://exceptionshub.com/subtract-n-hours-from-a-datetime-in-ruby.html
Questions: Answers: You can just subtract less than one whole day: two_hours_ago = DateTime.now - (2/24.0) This works for minutes and anything else too: hours = 10 minutes = 5 seconds = 64 hours = DateTime.now - (hours/24.0) #<DateTime: 2015-03-11T07:27:17+02:00 ( (2457093j,19637s,608393383n),+7200s,2299161j)> minutes = DateTime.now - (minutes/1440.0) …
https://blog.udemy.com/ruby-datetime/
Current Date and Time. You can ask Ruby to retrieve current system date and time and print it for you: #!/usr/bin/ruby -w time = Time.new puts "Current Time : " + time.inspect. This gives the following output: Current Time: Tue Dec 24 7:50:00 -0700 2013. Explanation: Here we have declared “time” as an object of the “Time.new” class which is already defined in the system. We are asking Ruby to display the current …
https://www.rubyguides.com/2015/12/ruby-time/
If you want the time zone offset you can use the utc_offset method. The output for this method is in seconds, but you can divide by 3600 to get it in hours. Example: t = Time.now t.zone # "CET" t.utc_offset / 3600 # 1 You can also get the current time in UTC: Time.now.utc Ruby Time Formatting. Ruby formats Time objects in a specific way by default.
https://ruby-doc.org/stdlib-2.6.1/libdoc/date/rdoc/DateTime.html
Since Ruby’s Time class implements a proleptic Gregorian calendar and has no concept of calendar reform there’s no way to express this with Time objects. This is where DateTime steps in: shakespeare = DateTime. iso8601 ( '1616-04-23', Date::ENGLAND ) #=> Tue, 23 Apr 1616 00:00:00 +0000 cervantes = DateTime. iso8601 ( '1616-04-23', Date ...
https://www.tutorialspoint.com/ruby/ruby_date_time.htm
#!/usr/bin/ruby -w time1 = Time.new puts "Current Time : " + time1.inspect # Time.now is a synonym: time2 = Time.now puts "Current Time : " + time2.inspect This will produce the following result −. Current Time : Mon Jun 02 12:02:39 -0700 2008 Current Time : Mon Jun 02 12:02:39 -0700 2008 Getting Components of a Date & Time
https://ruby-doc.org/stdlib/libdoc/date/rdoc/Date.html
The offset in this class is usually zero, and cannot be specified directly. A Date object can be created with an optional argument, the day of calendar reform as a Julian day number, which should be 2298874 to 2426355 or negative/positive infinity. The default value is Date::ITALY (2299161=1582-10-15).
https://developer.salesforce.com/forums/?id=906F00000008vTyIAI
Instead of (1/6) You have to use (DateTime - (1/6.0)) for 4 hrs subtraction (DateTime - (1/8.0)) for 3 hrs subtraction (DateTime - (1/12.0)) for 2 hrs subtraction (DateTime - (1/24.0)) for 1 hrs subtraction have a nice day!!
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