# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 304
def all_month
  beginning_of_month..end_of_month
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 309
def all_quarter
  beginning_of_quarter..end_of_quarter
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 299
def all_week(start_day = Date.beginning_of_week)
  beginning_of_week(start_day)..end_of_week(start_day)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 314
def all_year
  beginning_of_year..end_of_year
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 110
def beginning_of_month
  first_hour(change(:day => 1))
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 124
def beginning_of_quarter
  first_quarter_month = [10, 7, 4, 1].detect { |m| m <= month }
  beginning_of_month.change(:month => first_quarter_month)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 255
def beginning_of_week(start_day = Date.beginning_of_week)
  result = days_ago(days_to_week_start(start_day))
  acts_like?(:time) ? result.midnight : result
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 154
def beginning_of_year
  change(:month => 1).beginning_of_month
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 62
def days_ago(days)
  advance(:days => -days)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 67
def days_since(days)
  advance(:days => days)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 245
def days_to_week_start(start_day = Date.beginning_of_week)
  start_day_number = DAYS_INTO_WEEK[start_day]
  current_day_number = wday != 0 ? wday - 1 : 6
  (current_day_number - start_day_number) % 7
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 284
def end_of_month
  last_day = ::Time.days_in_month(month, year)
  last_hour(days_since(last_day - day))
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 139
def end_of_quarter
  last_quarter_month = [3, 6, 9, 12].detect { |m| m >= month }
  beginning_of_month.change(:month => last_quarter_month).end_of_month
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 271
def end_of_week(start_day = Date.beginning_of_week)
  last_hour(days_since(6 - days_to_week_start(start_day)))
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 292
def end_of_year
  change(:month => 12).end_of_month
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 47
def future?
  self > self.class.current
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 263
def monday
  beginning_of_week(:monday)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 82
def months_ago(months)
  advance(:months => -months)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 87
def months_since(months)
  advance(:months => months)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 32
def next_day
  advance(days: 1)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 190
def next_month
  months_since(1)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 195
def next_quarter
  months_since(3)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 175
def next_week(given_day_in_next_week = Date.beginning_of_week, same_time: false)
  result = first_hour(weeks_since(1).beginning_of_week.days_since(days_span(given_day_in_next_week)))
  same_time ? copy_time_to(result) : result
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 181
def next_weekday
  if next_day.on_weekend?
    next_week(:monday, same_time: true)
  else
    next_day
  end
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 200
def next_year
  years_since(1)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 57
def on_weekday?
  !WEEKEND_DAYS.include?(wday)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 52
def on_weekend?
  WEEKEND_DAYS.include?(wday)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 42
def past?
  self < self.class.current
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 22
def prev_day
  advance(days: -1)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 225
def prev_month
  months_ago(1)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 231
def prev_quarter
  months_ago(3)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 208
def prev_week(start_day = Date.beginning_of_week, same_time: false)
  result = first_hour(weeks_ago(1).beginning_of_week.days_since(days_span(start_day)))
  same_time ? copy_time_to(result) : result
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 215
def prev_weekday
  if prev_day.on_weekend?
    copy_time_to(beginning_of_week(:friday))
  else
    prev_day
  end
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 237
def prev_year
  years_ago(1)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 278
def sunday
  end_of_week(:monday)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 37
def today?
  to_date == ::Date.current
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 27
def tomorrow
  advance(days: 1)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 72
def weeks_ago(weeks)
  advance(:weeks => -weeks)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 77
def weeks_since(weeks)
  advance(:weeks => weeks)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 92
def years_ago(years)
  advance(:years => -years)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 97
def years_since(years)
  advance(:years => years)
end

# File activesupport/lib/active_support/core_ext/date_and_time/calculations.rb, line 17
def yesterday
  advance(days: -1)
end