re = /(^((\d{4}-(((0[13578]|[1][02])-(0[1-9]|[1-2]\d|3[01]))))|((\d{4}-(((0[469]|[1][1])-(0[1-9]|[1-2]\d|[3][0])))))|((\d{4}-(0[2]-(0[1-9]|[1-2]\d)))))T(([01]\d|2[0-3]):([0-5]\d):([0-5]\d))?([+-][0-2]\d:[0-5]\d)$)/m
str = '2022-02-29T22:58:00+05:30'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html