Class: Date

Inherits:
Object
  • Object
show all
Defined in:
lib/fat_core/date.rb

Constant Summary collapse

BOT =

Constants for Begining of Time (BOT) and End of Time (EOT) Both outside the range of what we would find in an accounting app.

Date.parse('1900-01-01')
EOT = 
Date.parse('3000-12-31')
FED_DECLARED_HOLIDAYS =

Holidays decreed by executive order

[
 Date.parse('2012-12-24')
]

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.days_in_month(y, m) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 401

def self.days_in_month(y, m)
  days = Time::COMMON_YEAR_DAYS_IN_MONTH[m]
  return(days) unless m == 2
  return Date.new(y, m, 1).leap? ? 29 : 28
end

.last_day_in_year_month(year, month) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 444

def self.last_day_in_year_month(year, month)
  days = [
          31, # Dec
          31, # Jan
          28, # Feb
          31, # Mar
          30, # Apr
          31, # May
          30, # Jun
          31, # Jul
          31, # Aug
          30, # Sep
          31, # Oct
          30, # Nov
          31, # Dec
         ]
  days[2] = 29 if Date.new(year, month, 1).leap?
  days[month % 12]
end

.nth_wday_in_year_month(n, wday, year, month) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 407

def self.nth_wday_in_year_month(n, wday, year, month)
  # Return the nth weekday in the given month
  # If n is negative, count from last day of month
  if n > 0
    # Set d to the 1st wday in month
    d = Date.new(year, month, 1)
    while d.wday != wday
      d += 1
    end
    # Set d to the nth wday in month
    nd = 1
    while nd != n
      d += 7
      nd += 1
    end
    return d
  elsif n < 0
    n = -n
    # Set d to the last wday in month
    d = Date.new(year, month,
                 Date.last_day_in_year_month(year, month))
    while d.wday != wday;
      d -= 1
    end
    # Set d to the nth wday in month
    nd = 1
    while nd != n
      d -= 7
      nd += 1
    end
    return d
  else
    raise ArgumentError,
      'Arg 1 to nth_wday_in_month_year cannot be zero'
  end
end

.parse_american(str) ⇒ Date

Convert a string with an American style date into a Date object

An American style date is of the form MM/DD/YYYY, that is it places the month first, then the day of the month, and finally the year. The European convention is to place the day of the month first, DD/MM/YYYY. Because a date found in the wild can be ambiguous, e.g. 3/5/2014, a date string known to be using the American convention can be parsed using this method. Both the month and the day can be a single digit. The year can be either 2 or 4 digits, and if given as 2 digits, it adds 2000 to it to give the year.

Examples:

Date.parse_american('9/11/2001') #=> Date(2011, 9, 11)
Date.parse_american('9/11/01')   #=> Date(2011, 9, 11)
Date.parse_american('9/11/1')    #=> ArgumentError

Parameters:

  • str (#to_s) —

    a stringling of the form MM/DD/YYYY

Returns:

  • (Date) —

    the date represented by the string paramenter.



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# File 'lib/fat_core/date.rb', line 27

def self.parse_american(str)
  if str.to_s =~ %r{\A\s*(\d\d?)\s*/\s*(\d\d?)\s*/\s*(\d?\d?\d\d)\s*\z}
    year, month, day = $3.to_i, $1.to_i, $2.to_i
    if year < 100
      year += 2000
    end
    Date.new(year, month, day)
  else
    raise ArgumentError, "date string must be of form 'MM?/DD?/YY(YY)?'"
  end
end

.parse_spec(spec, spec_type = :from) ⇒ Object

Convert a ‘date spec’ to a Date. A date spec is a short-hand way of

specifying a date, relative to the computer clock.  A date spec can
interpreted as either a 'from spec' or a 'to spec'.

@example
Assuming that Date.current at the time of execution is 2014-07-26 and
using the default spec_type of :from.  The return values are actually Date
objects, but are shown below as textual dates.

A fully specified date returns that date:
    Date.parse_spec('2001-09-11')  # =>

Commercial weeks can be specified using, for example W32 or 32W, with the
week beginning on Monday, ending on Sunday.
    Date.parse_spec('2012-W32')    # =>
    Date.parse_spec('2012-W32', :to) # =>
    Date.parse_spec('W32') # =>

A spec of the form Q3 or 3Q returns the beginning or end of calendar
quarters.
    Date.parse_spec('Q3')         # =>

@param spec [#to_s] a stringling containing the spec to be interpreted
@param spec_type [:from, :to] interpret the spec as a from- or to-spec
  respectively, defaulting to interpretation as a to-spec.
@return [Date] a date object equivalent to the date spec



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# File 'lib/fat_core/date.rb', line 67

def self.parse_spec(spec, spec_type = :from)
  spec = spec.to_s.strip
  unless [:from, :to].include?(spec_type)
    raise ArgumentError "invalid date spec type: '#{spec_type}'"
  end

  today = Date.current
  case spec
  when /^(\d\d\d\d)-(\d\d?)-(\d\d?)*$/
    # A specified date
    Date.new($1.to_i, $2.to_i, $3.to_i)
  when /\AW(\d\d?)\z/, /\A(\d\d?)W\z/
    week_num = $1.to_i
    if week_num < 1 || week_num > 53
      raise ArgumentError, "invalid week number (1-53): 'W#{week_num}'"
    end
    spec_type == :from ? Date.commercial(today.year, week_num).beginning_of_week :
      Date.commercial(today.year, week_num).end_of_week
  when /\A(\d\d\d\d)-W(\d\d?)\z/, /\A(\d\d\d\d)-(\d\d?)W\z/
    year = $1.to_i
    week_num = $2.to_i
    if week_num < 1 || week_num > 53
      raise ArgumentError, "invalid week number (1-53): 'W#{week_num}'"
    end
    spec_type == :from ? Date.commercial(year, week_num).beginning_of_week :
      Date.commercial(year, week_num).end_of_week
  when /^(\d\d\d\d)-(\d)[Qq]$/, /^(\d\d\d\d)-[Qq](\d)$/
    # Year-Quarter
    year = $1.to_i
    quarter = $2.to_i
    unless [1, 2, 3, 4].include?(quarter)
      raise ArgumentError, "bad date format: #{spec}"
    end
    month = quarter * 3
    spec_type == :from ? Date.new(year, month, 1).beginning_of_quarter :
      Date.new(year, month, 1).end_of_quarter
  when /^([1234])[qQ]$/, /^[qQ]([1234])$/
    # Quarter only
    this_year = today.year
    quarter = $1.to_i
    date = Date.new(this_year, quarter * 3, 15)
    spec_type == :from ? date.beginning_of_quarter : date.end_of_quarter
  when /^(\d\d\d\d)-(\d\d?)*$/
    # Year-Month only
    spec_type == :from ? Date.new($1.to_i, $2.to_i, 1) :
      Date.new($1.to_i, $2.to_i, 1).end_of_month
  when /\A(\d\d?)\z/
    # Month only
    spec_type == :from ? Date.new(today.year, $1.to_i, 1) :
      Date.new(today.year, $1.to_i, 1).end_of_month
  when /^(\d\d\d\d)$/
    # Year only
    spec_type == :from ? Date.new($1.to_i, 1, 1) : Date.new($1.to_i, 12, 31)
  when /^(to|this_?)?day/
    today
  when /^(yester|last_?)?day/
    today - 1.day
  when /^(this_?)?week/
    spec_type == :from ? today.beginning_of_week : today.end_of_week
  when /last_?week/
    spec_type == :from ? (today - 1.week).beginning_of_week :
      (today - 1.week).end_of_week
  when /^(this_?)?biweek/
    spec_type == :from ? today.beginning_of_biweek : today.end_of_biweek
  when /last_?biweek/
    spec_type == :from ? (today - 1.week).beginning_of_biweek :
      (today - 1.week).end_of_biweek
  when /^(this_?)?semimonth/
    spec_type == :from ? today.beginning_of_semimonth : today.end_of_semimonth
  when /^last_?semimonth/
    spec_type == :from ? (today - 15.days).beginning_of_semimonth :
      (today - 15.days).end_of_semimonth
  when /^(this_?)?month/
    spec_type == :from ? today.beginning_of_month : today.end_of_month
  when /^last_?month/
    spec_type == :from ? (today - 1.month).beginning_of_month :
      (today - 1.month).end_of_month
  when /^(this_?)?bimonth/
    spec_type == :from ? today.beginning_of_bimonth : today.end_of_bimonth
  when /^last_?bimonth/
    spec_type == :from ? (today - 1.month).beginning_of_bimonth :
      (today - 1.month).end_of_bimonth
  when /^(this_?)?quarter/
    spec_type == :from ? today.beginning_of_quarter : today.end_of_quarter
  when /^last_?quarter/
    spec_type == :from ? (today - 3.months).beginning_of_quarter :
      (today - 3.months).end_of_quarter
  when /^(this_?)?year/
    spec_type == :from ? today.beginning_of_year : today.end_of_year
  when /^last_?year/
    spec_type == :from ? (today - 1.year).beginning_of_year :
      (today - 1.year).end_of_year
  when /^forever/
    spec_type == :from ? Date::BOT : Date::EOT
  when /^never/
    nil
  else
    raise ArgumentError, "bad date spec: '#{spec}''"
  end # !> previous definition of length was here
end

Instance Method Details

#add_chunk(chunk) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 326

def add_chunk(chunk)
  case chunk
  when :year
    next_year
  when :quarter
    next_month(3)
  when :bimonth
    next_month(2)
  when :month
    next_month
  when :semimonth
    self + 15.days
  when :biweek
    self + 14.days
  when :week
    self + 7.days
  when :day
    self + 1.days
  else
    raise LogicError, "add_chunk unknown chunk: '#{chunk}'"
  end
end

#add_fed_business_days(n) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 692

def add_fed_business_days(n)
  d = self.dup
  if n < 0
    n.abs.times { d = d.prior_fed_workday }
  elsif n > 0
    n.times { d = d.next_fed_workday }
  end
  d
end

#add_nyse_business_days(n) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 711

def add_nyse_business_days(n)
  d = self.dup
  if n < 0
    n.abs.times { d = d.prior_nyse_workday }
  elsif n > 0
    n.times { d = d.next_nyse_workday }
  end
  d
end

#american ⇒ Object

Format date in MM/DD/YYYY form



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# File 'lib/fat_core/date.rb', line 318

def american
  strftime "%-m/%-d/%Y"
end

#beginning_of_bimonth ⇒ Object 



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# File 'lib/fat_core/date.rb', line 209

def beginning_of_bimonth
  if month % 2 == 1
    beginning_of_month
  else
    (self - 1.month).beginning_of_month
  end
end

#beginning_of_bimonth? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 275

def beginning_of_bimonth?
  month % 2 == 1 &&
    self.beginning_of_month == self
end

#beginning_of_biweek ⇒ Object

Note: we use a monday start of the week in the next two methods because commercial week counting assumes a monday start.



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# File 'lib/fat_core/date.rb', line 243

def beginning_of_biweek
  if cweek % 2 == 1
    beginning_of_week(:monday)
  else
    (self - 1.week).beginning_of_week(:monday)
  end
end

#beginning_of_biweek? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 301

def beginning_of_biweek?
  self.beginning_of_biweek == self
end

#beginning_of_chunk(sym) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 349

def beginning_of_chunk(sym)
  case sym
  when :year
    beginning_of_year
  when :quarter
    beginning_of_quarter
  when :bimonth
    beginning_of_bimonth
  when :month
    beginning_of_month
  when :semimonth
    beginning_of_semimonth
  when :biweek
    beginning_of_biweek
  when :week
    beginning_of_week
  when :day
    self
  else
    raise LogicError, "unknown chunk sym: '#{sym}'"
  end
end

#beginning_of_month? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 285

def beginning_of_month?
  self.beginning_of_month == self
end

#beginning_of_quarter? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 267

def beginning_of_quarter?
  self.beginning_of_quarter == self
end

#beginning_of_semimonth ⇒ Object 



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# File 'lib/fat_core/date.rb', line 225

def beginning_of_semimonth
  if day >= 16
    Date.new(year, month, 16)
  else
    beginning_of_month
  end
end

#beginning_of_semimonth? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 293

def beginning_of_semimonth?
  self.beginning_of_semimonth == self
end

#beginning_of_week? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 309

def beginning_of_week?
  self.beginning_of_week == self
end

#beginning_of_year? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 259

def beginning_of_year?
  self.beginning_of_year == self
end

#easter? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 480

def easter?
  # Am I Easter?
  # Easter is always in March or April
  return false unless [3, 4].include?(self.mon)
  return self == self.easter_this_year
end

#easter_this_year ⇒ Object 



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# File 'lib/fat_core/date.rb', line 464

def easter_this_year
  # Return the date of Easter in self's year
  y = self.year
  a = y % 19
  b, c = y.divmod(100)
  d, e = b.divmod(4)
  f = (b + 8) / 25
  g = (b - f + 1) / 3
  h = (19 * a + b - d - g + 15) % 30
  i, k = c.divmod(4)
  l = (32 + 2*e + 2*i - h - k) % 7
  m = (a + 11*h + 22*l) / 451
  n, p = (h + l - 7*m + 114).divmod(31)
  return Date.new(y, n, p + 1)
end

#end_of_bimonth ⇒ Object 



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# File 'lib/fat_core/date.rb', line 217

def end_of_bimonth
  if month % 2 == 1
    (self + 1.month).end_of_month
  else
    end_of_month
  end
end

#end_of_bimonth? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 280

def end_of_bimonth?
  month % 2 == 0 &&
    self.end_of_month == self
end

#end_of_biweek ⇒ Object 



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# File 'lib/fat_core/date.rb', line 251

def end_of_biweek
  if cweek % 2 == 1
    (self + 1.week).end_of_week(:monday)
  else
    end_of_week(:monday)
  end
end

#end_of_biweek? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 305

def end_of_biweek?
  self.end_of_biweek == self
end

#end_of_chunk(sym) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 372

def end_of_chunk(sym)
  case sym
  when :year
    end_of_year
  when :quarter
    end_of_quarter
  when :bimonth
    end_of_bimonth
  when :month
    end_of_month
  when :semimonth
    end_of_semimonth
  when :biweek
    end_of_biweek
  when :week
    end_of_week
  when :day
    self
  else
    raise LogicError, "unknown chunk sym: '#{sym}'"
  end
end

#end_of_month? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 289

def end_of_month?
  self.end_of_month == self
end

#end_of_quarter? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 271

def end_of_quarter?
  self.end_of_quarter == self
end

#end_of_semimonth ⇒ Object 



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# File 'lib/fat_core/date.rb', line 233

def end_of_semimonth
  if day <= 15
    Date.new(year, month, 15)
  else
    end_of_month
  end
end

#end_of_semimonth? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 297

def end_of_semimonth?
  self.end_of_semimonth == self
end

#end_of_week? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 313

def end_of_week?
  self.end_of_week == self
end

#end_of_year? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 263

def end_of_year?
  self.end_of_year == self
end

#eng ⇒ Object 



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# File 'lib/fat_core/date.rb', line 192

def eng
  strftime("%B %e, %Y")
end

#expand_to_period(sym) ⇒ Object 



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# File 'lib/fat_core/date.rb', line 322

def expand_to_period(sym)
  Period.new(beginning_of_chunk(sym), end_of_chunk(sym))
end

#fed_fixed_holiday? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 499

def fed_fixed_holiday?
  # Fixed-date holidays on weekdays
  if self.mon == 1 && self.mday == 1
    # New Years (January 1),
    return true
  elsif self.mon == 7 && self.mday == 4
    # Independence Day (July 4),
    return true
  elsif self.mon == 11 && self.mday == 11
    # Veterans Day (November 11),
    return true
  elsif self.mon == 12 && self.mday == 25
    # Christmas (December 25), and
    return true
  elsif self.mon == 12 && self.mday == 31
    # New Year's Eve (December 31)
    return true;
  else
    return false
  end
end

#fed_holiday? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 550

def fed_holiday?
  if FED_DECLARED_HOLIDAYS.include?(self)
    return true
  end

  # All Saturdays and Sundays are "holidays"
  if self.weekend? then return true end

  # Is self a fixed holiday
  return true if self.fed_fixed_holiday?

  # A Friday is a holiday if a fixed-date holiday
  # would fall on the following Saturday
  if self.wday == 5
    td = self + 1
    return true if td.fed_fixed_holiday?
  end

  # A Monday is a holiday if a fixed-date holiday
  # would fall on the preceding Sunday
  if self.wday == 1
    td = self - 1
    return true if td.fed_fixed_holiday?
  end

  # If Christmas falls on a Thursday, apparently, the Friday after is
  # treated as a holiday as well.  See 2003, 2008, for example.
  if self.wday == 5 and self.month == 12 and self.day == 26
    return true
  end

  # It's last chance is if its a movable feast
  return self.fed_moveable_feast?;
end

#fed_moveable_feast? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 521

def fed_moveable_feast?
  # See if today is a "movable feast," all of which are
  # rigged to fall on Monday except Thanksgiving

  # No moveable feasts in certain months
  if [ 3, 4, 6, 7, 8, 12 ].include?(self.month)
    return false
  elsif self.wday == 1
    # MLK's Birthday (Third Monday in Jan)
    return true if self.nth_wday_in_month?(3, 1, 1)
    # Washington's Birthday (Third Monday in Feb)
    return true if self.nth_wday_in_month?(3, 1, 2)
    # Memorial Day (Last Monday in May)
    return true if self.nth_wday_in_month?(-1, 1, 5)
    # Labor Day (First Monday in Sep)
    return true if self.nth_wday_in_month?(1, 1, 9)
    # Columbus Day (Second Monday in Oct)
    return true if self.nth_wday_in_month?(2, 1, 10)
    # Other Mondays
    return false
  elsif self.wday == 4
    # Thanksgiving Day (Fourth Thur in Nov)
    return false unless self.month == 11
    return self.nth_wday_in_month?(4, 4, 11)
  else
    return false
  end
end

#fed_workday? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 676

def fed_workday?
  return ! self.fed_holiday?;
end

#iso ⇒ Object 



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# File 'lib/fat_core/date.rb', line 184

def iso
  strftime("%Y-%m-%d")
end

#next_fed_workday ⇒ Object 



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# File 'lib/fat_core/date.rb', line 684

def next_fed_workday
  result = self + 1
  while result.fed_holiday?
    result += 1;
  end
  return result
end

#next_nyse_workday ⇒ Object 



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# File 'lib/fat_core/date.rb', line 702

def next_nyse_workday
  result = self.dup
  result += 1
  while result.nyse_holiday?
    result += 1;
  end
  return result
end

#nth_wday_in_month?(n, wday, month) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 487

def nth_wday_in_month?(n, wday, month)
  # Is self the nth weekday in the given month of its year?
  # If n is negative, count from last day of month
  if self.wday != wday
    return false
  elsif self.mon != month
    return false
  else
    return self == Date.nth_wday_in_year_month(n, wday, self.year, month)
  end
end

#num ⇒ Object 



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# File 'lib/fat_core/date.rb', line 742

def num
  strftime("%Y%m%d")
end

#nyse_fixed_holiday? ⇒ Boolean

Rule: if it falls on Saturday, observe on preceding Friday. Rule: if it falls on Sunday, observe on following Monday.

New Year’s Day, January 1. Birthday of Martin Luther King, Jr., the third Monday in January. Washington’s Birthday, the third Monday in February. Good Friday Friday before Easter Sunday. NOTE: not a fed holiday Memorial Day, the last Monday in May. Independence Day, July 4. Labor Day, the first Monday in September. NOTE: Columbus and Veterans days not observed Thanksgiving Day, the fourth Thursday in November. Christmas Day, December 25.

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 604

def nyse_fixed_holiday?
  # Fixed-date holidays
  if self.mon == 1 && self.mday == 1
    # New Years (January 1),
    return true
  elsif self.mon == 7 && self.mday == 4
    # Independence Day (July 4),
    return true
  elsif self.mon == 12 && self.mday == 25
    # Christmas (December 25), and
    return true
  else
    return false
  end
end

#nyse_holiday? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 651

def nyse_holiday?
  # All Saturdays and Sundays are "holidays"
  return true if self.weekend?

  # Is self a fixed holiday
  return true if self.nyse_fixed_holiday?

  # A Friday is a holiday if a fixed-date holiday
  # would fall on the following Saturday
  if self.wday == 5
    td = self + 1
    return true if td.nyse_fixed_holiday?
  end

  # A Monday is a holiday if a fixed-date holiday
  # would fall on the preceding Sunday
  if self.wday == 1
    td = self - 1
    return true if td.nyse_fixed_holiday?
  end

  # It's last chance is if its a movable feast
  return self.nyse_moveable_feast?;
end

#nyse_moveable_feast? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 620

def nyse_moveable_feast?
  # See if today is a "movable feast," all of which are
  # rigged to fall on Monday except Thanksgiving

  # No moveable feasts in certain months
  if [ 6, 7, 8, 10, 12 ].include?(self.month)
    return false
  elsif self.wday == 1
    # MLK's Birthday (Third Monday in Jan)
    return true if self.nth_wday_in_month?(3, 1, 1)
    # Washington's Birthday (Third Monday in Feb)
    return true if self.nth_wday_in_month?(3, 1, 2)
    # Memorial Day (Last Monday in May)
    return true if self.nth_wday_in_month?(-1, 1, 5)
    # Labor Day (First Monday in Sep)
    return true if self.nth_wday_in_month?(1, 1, 9)
    # Other Mondays
    return false
  elsif self.wday == 4
    # Thanksgiving Day (Fourth Thur in Nov)
    return false unless self.month == 11
    return self.nth_wday_in_month?(4, 4, 11)
  elsif self.wday == 5
    # Good Friday, the Friday before Easter
    td = self + 2
    return td.easter?
  else
    return false
  end
end

#nyse_workday? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 680

def nyse_workday?
  return ! self.nyse_holiday?;
end

#org ⇒ Object 



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# File 'lib/fat_core/date.rb', line 188

def org
  strftime("[%Y-%m-%d %a]")
end

#pred ⇒ Object 



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# File 'lib/fat_core/date.rb', line 176

def pred
  self - 1.day
end

#prior_fed_workday ⇒ Object 



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# File 'lib/fat_core/date.rb', line 721

def prior_fed_workday
  result = self - 1
  while result.fed_holiday?
    result -= 1;
  end
  return result
end

#prior_nyse_workday ⇒ Object 



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# File 'lib/fat_core/date.rb', line 729

def prior_nyse_workday
  result = self.dup
  result -= 1
  while result.nyse_holiday?
    result -= 1;
  end
  return result
end

#quarter ⇒ Object 



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# File 'lib/fat_core/date.rb', line 196

def quarter
  case month
  when (1..3)
    1
  when (4..6)
    2
  when (7..9)
    3
  when (10..12)
    4
  end
end

#succ ⇒ Object 



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# File 'lib/fat_core/date.rb', line 180

def succ
  self + 1.day
end

#tex_quote ⇒ Object

Allow erb documents can directly interpolate dates



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# File 'lib/fat_core/date.rb', line 754

def tex_quote
  iso
end

#weekday? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 172

def weekday?
  !weekend?
end

#weekend? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 168

def weekend?
  saturday? || sunday?
end

#within_6mos_of?(d) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fat_core/date.rb', line 746

def within_6mos_of?(d)
  # Date 6 calendar months before self
  start_date = self - 6.months + 2.days
  end_date = self + 6.months - 2.days
  (start_date..end_date).cover?(d)
end