public override bool isBusinessDay(DateTime date)
{
DayOfWeek w = date.DayOfWeek;
int d = date.Day, dd = date.DayOfYear;
Month m = (Month)date.Month;
int y = date.Year;
int em = easterMonday(y);
if (isWeekend(w)
// New Year's Day
|| ((d == 1 || (d == 2 && w == DayOfWeek.Monday)) && m == Month.January)
// Good Friday
|| (dd == em - 3)
// Labor Day
|| ((d == 1 || (d == 2 && w == DayOfWeek.Monday)) && m == Month.May)
// National Day
|| ((d == 9 || (d == 10 && w == DayOfWeek.Monday)) && m == Month.August)
// Christmas Day
|| ((d == 25 || (d == 26 && w == DayOfWeek.Monday)) && m == Month.December)
// Chinese New Year
|| ((d == 22 || d == 23) && m == Month.January && y == 2004) ||
((d == 9 || d == 10) && m == Month.February && y == 2005) ||
((d == 30 || d == 31) && m == Month.January && y == 2006) ||
((d == 19 || d == 20) && m == Month.February && y == 2007) ||
((d == 7 || d == 8) && m == Month.February && y == 2008) ||
((d == 26 || d == 27) && m == Month.January && y == 2009) ||
((d == 15 || d == 16) && m == Month.January && y == 2010) ||
((d == 23 || d == 24) && m == Month.January && y == 2012) ||
((d == 11 || d == 12) && m == Month.February && y == 2013) ||
(d == 31 && m == Month.January && y == 2014) ||
(d == 1 && m == Month.February && y == 2014) ||
((d == 19 || d == 20) && m == Month.February && y == 2015) ||
((d == 8 || d == 9) && m == Month.February && y == 2016) ||
((d == 28 || d == 29 || d == 30) && m == Month.January && y == 2017)
// Vesak Day
|| (d == 2 && m == Month.June && y == 2004) ||
(d == 22 && m == Month.May && y == 2005) ||
(d == 12 && m == Month.May && y == 2006) ||
(d == 31 && m == Month.May && y == 2007) ||
(d == 18 && m == Month.May && y == 2008) ||
(d == 9 && m == Month.May && y == 2009) ||
(d == 28 && m == Month.May && y == 2010) ||
(d == 5 && m == Month.May && y == 2012) ||
(d == 24 && m == Month.May && y == 2013) ||
(d == 13 && m == Month.May && y == 2014) ||
(d == 1 && m == Month.June && y == 2015) ||
(d == 21 && m == Month.May && y == 2016) ||
(d == 10 && m == Month.May && y == 2017)
// Hari Raya Puasa
|| ((d == 14 || d == 15) && m == Month.November && y == 2004) ||
(d == 3 && m == Month.November && y == 2005) ||
(d == 24 && m == Month.October && y == 2006) ||
(d == 13 && m == Month.October && y == 2007) ||
(d == 1 && m == Month.October && y == 2008) ||
(d == 21 && m == Month.September && y == 2009) ||
(d == 10 && m == Month.September && y == 2010) ||
(d == 20 && m == Month.August && y == 2012) ||
(d == 8 && m == Month.August && y == 2013) ||
(d == 28 && m == Month.July && y == 2014) ||
(d == 17 && m == Month.July && y == 2015) ||
(d == 6 && m == Month.July && y == 2016) ||
((d == 25 || d == 26) && m == Month.June && y == 2017)
// Hari Raya Haji
|| ((d == 1 || d == 2) && m == Month.February && y == 2004) ||
(d == 21 && m == Month.January && y == 2005) ||
(d == 10 && m == Month.January && y == 2006) ||
(d == 2 && m == Month.January && y == 2007) ||
(d == 20 && m == Month.December && y == 2007) ||
(d == 8 && m == Month.December && y == 2008) ||
(d == 27 && m == Month.November && y == 2009) ||
(d == 17 && m == Month.November && y == 2010) ||
(d == 26 && m == Month.October && y == 2012) ||
(d == 15 && m == Month.October && y == 2013) ||
(d == 6 && m == Month.October && y == 2014) ||
(d == 24 && m == Month.September && y == 2015) ||
(d == 12 && m == Month.September && y == 2016) ||
(d == 1 && m == Month.September && y == 2017)
// Deepavali
|| (d == 11 && m == Month.November && y == 2004) ||
(d == 1 && m == Month.November && y == 2005) ||
(d == 8 && m == Month.November && y == 2007) ||
(d == 28 && m == Month.October && y == 2008) ||
(d == 16 && m == Month.November && y == 2009) ||
(d == 5 && m == Month.November && y == 2010) ||
(d == 13 && m == Month.November && y == 2012) ||
(d == 4 && m == Month.November && y == 2013) ||
(d == 23 && m == Month.October && y == 2014) ||
(d == 10 && m == Month.November && y == 2015) ||
(d == 29 && m == Month.October && y == 2016) ||
(d == 18 && m == Month.October && y == 2017)
// other events
// SG50
|| (d == 7 && m == Month.August && y == 2015)
// Polling Day
|| (d == 11 && m == Month.September && y == 2015)
)
{
return(false);
}
return(true);
}
public override bool isBusinessDay(DateTime date)
{
DayOfWeek w = date.DayOfWeek;
int d = date.Day, dd = date.DayOfYear;
Month m = (Month)date.Month;
int y = date.Year;
// equinox calculation
double exact_vernal_equinox_time = 20.69115;
double exact_autumnal_equinox_time = 23.09;
double diff_per_year = 0.242194;
double moving_amount = (y - 2000) * diff_per_year;
int number_of_leap_years = (y - 2000) / 4 + (y - 2000) / 100 - (y - 2000) / 400;
int ve = (int)(exact_vernal_equinox_time + moving_amount - number_of_leap_years); // vernal equinox day
int ae = (int)(exact_autumnal_equinox_time + moving_amount - number_of_leap_years); // autumnal equinox day
// checks
if (isWeekend(w)
// New Year's Day
|| (d == 1 && m == Month.January)
// Bank Holiday
|| (d == 2 && m == Month.January)
// Bank Holiday
|| (d == 3 && m == Month.January)
// Coming of Age Day (2nd Monday in January),
// was January 15th until 2000
|| (w == DayOfWeek.Monday && (d >= 8 && d <= 14) && m == Month.January &&
y >= 2000) ||
((d == 15 || (d == 16 && w == DayOfWeek.Monday)) && m == Month.January &&
y < 2000)
// National Foundation Day
|| ((d == 11 || (d == 12 && w == DayOfWeek.Monday)) && m == Month.February)
// Vernal Equinox
|| ((d == ve || (d == ve + 1 && w == DayOfWeek.Monday)) && m == Month.March)
// Greenery Day
|| ((d == 29 || (d == 30 && w == DayOfWeek.Monday)) && m == Month.April)
// Constitution Memorial Day
|| (d == 3 && m == Month.May)
// Holiday for a Nation
|| (d == 4 && m == Month.May)
// Children's Day
|| (d == 5 && m == Month.May)
// any of the three above observed later if on Saturday or Sunday
|| (d == 6 && m == Month.May && (w == DayOfWeek.Monday || w == DayOfWeek.Tuesday || w == DayOfWeek.Wednesday))
// Marine Day (3rd Monday in July),
// was July 20th until 2003, not a holiday before 1996
|| (w == DayOfWeek.Monday && (d >= 15 && d <= 21) && m == Month.July &&
y >= 2003) ||
((d == 20 || (d == 21 && w == DayOfWeek.Monday)) && m == Month.July &&
y >= 1996 && y < 2003)
// Mountain Day (from 2016)
|| (d == 11 && m == Month.August && y >= 2016)
// Respect for the Aged Day (3rd Monday in September),
// was September 15th until 2003
|| (w == DayOfWeek.Monday && (d >= 15 && d <= 21) && m == Month.September &&
y >= 2003) ||
((d == 15 || (d == 16 && w == DayOfWeek.Monday)) && m == Month.September &&
y < 2003)
// If a single day falls between Respect for the Aged Day
// and the Autumnal Equinox, it is holiday
|| (w == DayOfWeek.Tuesday && d + 1 == ae && d >= 16 && d <= 22 &&
m == Month.September && y >= 2003)
// Autumnal Equinox
|| ((d == ae || (d == ae + 1 && w == DayOfWeek.Monday)) && m == Month.September)
// Health and Sports Day (2nd Monday in October),
// was October 10th until 2000
|| (w == DayOfWeek.Monday && (d >= 8 && d <= 14) && m == Month.October &&
y >= 2000) ||
((d == 10 || (d == 11 && w == DayOfWeek.Monday)) && m == Month.October &&
y < 2000)
// National Culture Day
|| ((d == 3 || (d == 4 && w == DayOfWeek.Monday)) && m == Month.November)
// Labor Thanksgiving Day
|| ((d == 23 || (d == 24 && w == DayOfWeek.Monday)) && m == Month.November)
// Emperor's Birthday
|| ((d == 23 || (d == 24 && w == DayOfWeek.Monday)) && m == Month.December &&
y >= 1989)
// Bank Holiday
|| (d == 31 && m == Month.December)
// one-shot holidays
// Marriage of Prince Akihito
|| (d == 10 && m == Month.April && y == 1959)
// Rites of Imperial Funeral
|| (d == 24 && m == Month.February && y == 1989)
// Enthronement Ceremony
|| (d == 12 && m == Month.November && y == 1990)
// Marriage of Prince Naruhito
|| (d == 9 && m == Month.June && y == 1993))
{
return(false);
}
return(true);
}
