Ruby DateTime#next_year on leap days

datetime.rb

#!/usr/bin/env ruby

require 'date'

now = DateTime.now
yesterday = now - 1

puts "Now: #{now}"
puts "Yesterday: #{yesterday}"
puts "======"

one_year_from_now = now.next_year
one_year_from_yesterday = yesterday.next_year

puts "Now + 1.year: #{one_year_from_now}"
puts "Yesterday + 1.year: #{one_year_from_yesterday}"
puts "======"

puts "Equal? #{one_year_from_now == one_year_from_yesterday}"

output.txt

Now: 2024-02-29T15:34:50+11:00
Yesterday: 2024-02-28T15:34:50+11:00
======
Now + 1.year: 2025-02-28T15:34:50+11:00
Yesterday + 1.year: 2025-02-28T15:34:50+11:00
======
Equal? true