Date.prototype.one_day_epoch=1000*60*60*24;Date.prototype.jp_hol_vernal_equinox_days={1925:'3/21',1926:'3/21',1927:'3/21',1928:'3/21',1929:'3/21',1930:'3/21',1931:'3/21',1932:'3/21',1933:'3/21',1934:'3/21',1935:'3/21',1936:'3/21',1937:'3/21',1938:'3/21',1939:'3/21',1940:'3/21',1941:'3/21',1942:'3/21',1943:'3/21',1944:'3/21',1945:'3/21',1946:'3/21',1947:'3/21',1948:'3/21',1949:'3/21',1950:'3/21',1951:'3/21',1952:'3/21',1953:'3/21',1954:'3/21',1955:'3/21',1956:'3/21',1957:'3/21',1958:'3/21',1959:'3/21',1960:'3/20',1961:'3/21',1962:'3/21',1963:'3/21',1964:'3/20',1965:'3/21',1966:'3/21',1967:'3/21',1968:'3/20',1969:'3/21',1970:'3/21',1971:'3/21',1972:'3/20',1973:'3/21',1974:'3/21',1975:'3/21',1976:'3/20',1977:'3/21',1978:'3/21',1979:'3/21',1980:'3/20',1981:'3/21',1982:'3/21',1983:'3/21',1984:'3/20',1985:'3/21',1986:'3/21',1987:'3/21',1988:'3/20',1989:'3/21',1990:'3/21',1991:'3/21',1992:'3/20',1993:'3/20',1994:'3/21',1995:'3/21',1996:'3/20',1997:'3/20',1998:'3/21',1999:'3/21',2000:'3/20',2001:'3/20',2002:'3/21',2003:'3/21',2004:'3/20',2005:'3/20',2006:'3/21',2007:'3/21',2008:'3/20',2009:'3/20',2010:'3/21',2011:'3/21',2012:'3/20',2013:'3/20',2014:'3/21',2015:'3/21'};Date.prototype.jp_hol_autumnal_equinox_days={1925:'9/23',1926:'9/24',1927:'9/24',1928:'9/23',1929:'9/23',1930:'9/24',1931:'9/24',1932:'9/23',1933:'9/23',1934:'9/24',1935:'9/24',1936:'9/23',1937:'9/23',1938:'9/24',1939:'9/24',1940:'9/23',1941:'9/23',1942:'9/24',1943:'9/24',1944:'9/23',1945:'9/23',1946:'9/24',1947:'9/24',1948:'9/23',1949:'9/23',1950:'9/23',1951:'9/24',1952:'9/23',1953:'9/23',1954:'9/23',1955:'9/24',1956:'9/23',1957:'9/23',1958:'9/23',1959:'9/24',1960:'9/23',1961:'9/23',1962:'9/23',1963:'9/24',1964:'9/23',1965:'9/23',1966:'9/23',1967:'9/24',1968:'9/23',1969:'9/23',1970:'9/23',1971:'9/24',1972:'9/23',1973:'9/23',1974:'9/23',1975:'9/24',1976:'9/23',1977:'9/23',1978:'9/23',1979:'9/24',1980:'9/23',1981:'9/23',1982:'9/23',1983:'9/23',1984:'9/23',1985:'9/23',1986:'9/23',1987:'9/23',1988:'9/23',1989:'9/23',1990:'9/23',1991:'9/23',1992:'9/23',1993:'9/23',1994:'9/23',1995:'9/23',1996:'9/23',1997:'9/23',1998:'9/23',1999:'9/23',2000:'9/23',2001:'9/23',2002:'9/23',2003:'9/23',2004:'9/23',2005:'9/23',2006:'9/23',2007:'9/23',2008:'9/23',2009:'9/23',2010:'9/23',2011:'9/23',2012:'9/22',2013:'9/23',2014:'9/23',2015:'9/23'};Date.prototype.getJpHolNationalFoundationDay=function(y){return 1967<=y?'2/11':null;}
Date.prototype.getJpHolEquinoxDateCalc=function(y,va){var equinox;switch(va){case'vernal':equinox=953537715.36;break;case'autumnal':equinox=969642576.00;break;}
var i;var y_sum=0;for(i=0;i>y-2000;i--){y_sum+=i;}
for(i=0;i<y-2000;i++){y_sum+=i;}
var target_date_equinox=new Date((equinox+(3155692525056*(y-2000)/100000)+(53*y_sum/10000))*1000);return(target_date_equinox.getMonth()+1)+'/'+target_date_equinox.getDate();}
Date.prototype.isJpHolVernalEquinoxDay=function(y,m_d){var ve_m_d;if(this.jp_hol_vernal_equinox_days[y]){ve_m_d=this.jp_hol_vernal_equinox_days[y];}else{ve_m_d=this.getJpHolEquinoxDateCalc(y,'vernal');this.jp_hol_vernal_equinox_days[y]=ve_m_d;}
return m_d==ve_m_d?true:false;}
Date.prototype.isJpHolAutumnalEquinoxDay=function(y,m_d){var va_m_d;if(this.jp_hol_autumnal_equinox_days[y]){va_m_d=this.jp_hol_autumnal_equinox_days[y];}else{va_m_d=this.getJpHolEquinoxDateCalc(y,'autumnal');this.jp_hol_autumnal_equinox_days[y]=va_m_d;}
return m_d==va_m_d?true:false;}
Date.prototype.isJpHoliday=function(by_date_itself){var y=this.getFullYear();var m_d=(this.getMonth()+1)+'/'+this.getDate();var y_m_d=y+'/'+m_d;var national_foundation_m_d=this.getJpHolNationalFoundationDay(y);if(this.is_jp_holiday&&typeof(this.is_jp_holiday)=='boolean'&&this.y_m_d&&this.y_m_d==y_m_d){return this.is_jp_holiday;}
this.y_m_d=y_m_d;switch(m_d){case'1/1':if(1949<=y){this.jp_hol_name='元日';this.jp_hol_engl='New Year\'s Day';this.jp_hol_desc='年のはじめを祝う。';this.is_jp_holiday=true;return true;}
break;case'1/15':if(1949<=y&&y<=1999){this.jp_hol_name='成人の日';this.jp_hol_engl='Coming of Age Day';this.jp_hol_desc='おとなになったことを自覚し、みずから生き抜こうとする青年を祝いはげます。';this.is_jp_holiday=true;return true;}
break;case'4/29':if(1927<=y&&y<=1988){this.jp_hol_name='天皇誕生日';this.jp_hol_engl='Emperor\'s Birthday';this.jp_hol_desc='天皇の誕生日を祝う。';this.is_jp_holiday=true;return true;}else if(1989<=y&&y<=2006){this.jp_hol_name='みどりの日';this.jp_hol_engl='Greenery Day';this.jp_hol_desc='自然に親しむとともにその恩恵に感謝し、豊かな心をはぐくむ。';this.is_jp_holiday=true;return true;}else if(2007<=y){this.jp_hol_name='昭和の日';this.jp_hol_engl='Showa Day';this.jp_hol_desc='激動の日々を経て、復興を遂げた昭和の時代を顧み、国の将来に思いをいたす。';this.is_jp_holiday=true;return true;}
break;case'5/3':if(1949<=y){this.jp_hol_name='憲法記念日';this.jp_hol_engl='Constitution Memorial Day';this.jp_hol_desc='日本国憲法の施行を記念し、国の成長を期する。';this.is_jp_holiday=true;return true;}
break;case'5/4':if(2007<=y){this.jp_hol_name='みどりの日';this.jp_hol_engl='Greenery Day';this.jp_hol_desc='自然に親しむとともにその恩恵に感謝し、豊かな心をはぐくむ。';this.is_jp_holiday=true;return true;}
break;case'5/5':if(1949<=y){this.jp_hol_name='こどもの日';this.jp_hol_engl='Children\'s Day';this.jp_hol_desc='こどもの人格を重んじ、こどもの幸福をはかるとともに、母に感謝する。';this.is_jp_holiday=true;return true;}
break;case'7/20':if(1996<=y&&y<=2002){this.jp_hol_name='海の日';this.jp_hol_engl='Marine Day';this.jp_hol_desc='海の恩恵に感謝するとともに、海洋国日本の繁栄を願う。';this.is_jp_holiday=true;return true;}
break;case'9/15':if(1967<=y&&y<=2002){this.jp_hol_name='敬老の日';this.jp_hol_engl='Respect for the Aged Day';this.jp_hol_desc='多年にわたり社会につくしてきた老人を敬愛し、長寿を祝う。';this.is_jp_holiday=true;return true;}
break;case'10/10':if(1966<=y&&y<=1999){this.jp_hol_name='体育の日';this.jp_hol_engl='Health and Sports Day';this.jp_hol_desc='スポーツにしたしみ、健康な心身をつちかう。';this.is_jp_holiday=true;return true;}
break;case'11/3':if(1948<=y){this.jp_hol_name='文化の日';this.jp_hol_engl='National Culture Day';this.jp_hol_desc='自由と平和を愛し、文化をすすめる。';this.is_jp_holiday=true;return true;}
break;case'11/23':if(1948<=y){this.jp_hol_name='勤労感謝の日';this.jp_hol_engl='Labor Thanksgiving Day';this.jp_hol_desc='勤労をたっとび、生産を祝い、国民たがいに感謝しあう。';this.is_jp_holiday=true;return true;}
break;case'12/23':if(1989<=y){this.jp_hol_name='天皇誕生日';this.jp_hol_engl='Emperor\'s Birthday';this.jp_hol_desc='天皇の誕生日を祝う。';this.is_jp_holiday=true;return true;}
break;case national_foundation_m_d:if(1967<=y){this.jp_hol_name='建国記念の日';this.jp_hol_engl='National Foundation Day';this.jp_hol_desc='建国をしのび、国を愛する心を養う。';this.is_jp_holiday=true;return true;}
break;}
switch((this.getMonth()+1)+'-'+Math.ceil(this.getDate()/7)+'-'+this.getDay()){case'1-2-1':if(2000<=y){this.jp_hol_name='成人の日';this.jp_hol_engl='Coming of Age Day';this.jp_hol_desc='おとなになったことを自覚し、みずから生き抜こうとする青年を祝いはげます。';this.is_jp_holiday=true;return true;}
break;case'7-3-1':if(2003<=y){this.jp_hol_name='海の日';this.jp_hol_engl='Marine Day';this.jp_hol_desc='海の恩恵に感謝するとともに、海洋国日本の繁栄を願う。';this.is_jp_holiday=true;return true;}
break;case'9-3-1':if(2003<=y){this.jp_hol_name='敬老の日';this.jp_hol_engl='Respect for the Aged Day';this.jp_hol_desc='多年にわたり社会につくしてきた老人を敬愛し、長寿を祝う。';this.is_jp_holiday=true;return true;}
break;case'10-2-1':if(2000<=y){this.jp_hol_name='体育の日';this.jp_hol_engl='Health and Sports Day';this.jp_hol_desc='スポーツにしたしみ、健康な心身をつちかう。';this.is_jp_holiday=true;return true;}
break;}
if(this.isJpHolVernalEquinoxDay(y,m_d)){if(1949<=y){this.jp_hol_name='春分の日';this.jp_hol_engl='Vernal Equinox';this.jp_hol_desc='自然をたたえ、生物をいつくしむ。';this.is_jp_holiday=true;return true;}}
if(this.isJpHolAutumnalEquinoxDay(y,m_d)){if(1948<=y){this.jp_hol_name='秋分の日';this.jp_hol_engl='Autumnal Equinox';this.jp_hol_desc='祖先をうやまい、なくなった人々をしのぶ。';this.is_jp_holiday=true;return true;}}
if(by_date_itself){this.jp_hol_name=null;this.jp_hol_engl=null;this.jp_hol_desc=null;this.is_jp_holiday=false;return false;}
var date_before=new Date(this.getTime()-this.one_day_epoch);if(date_before.isJpHoliday(true)){if(date_before.getDay()==0){this.jp_hol_name='振替休日';this.jp_hol_engl='Substitute Holiday';this.jp_hol_desc=null;this.is_jp_holiday=true;return true;}
if(1986<=y){var date_after=new Date(this.getTime()+this.one_day_epoch);if(date_after.isJpHoliday(true)){this.jp_hol_name='国民の休日';this.jp_hol_engl='Holiday for a Nation';this.jp_hol_desc=null;this.is_jp_holiday=true;return true;}}
if(2007<=y){date_before.setTime(date_before.getTime()-this.one_day_epoch);while(date_before.isJpHoliday(true)){if(date_before.getDay()==0){this.jp_hol_name='振替休日';this.jp_hol_engl='Substitute Holiday';this.jp_hol_desc=null;this.is_jp_holiday=true;return true;}
date_before.setTime(date_before.getTime()-this.one_day_epoch);}}}
this.jp_hol_name=null;this.jp_hol_engl=null;this.jp_hol_desc=null;this.is_jp_holiday=false;return false;}