Brasil

Business days calculator

Count working days in Brasil (no Saturdays, Sundays or holidays)

Between two dates Add business days

Count working days in Brasil (no Saturdays, Sundays or holidays)

This month Next 30 days Until year end +10 business days +15 business days +30 business days

9658

business days

From January 1, 1988 to July 24, 2026

We swapped the dates because “to” was earlier than “from”.

Business day 9658
Weekend 4024
Holidays 402

14085 days in the period

14085

Total days

4024

Weekend

402

Holidays

Holidays in the period

New Year's Day Fri 1 Jan 1988
Carnival Monday Mon 15 Feb 1988
Carnival Tuesday Tue 16 Feb 1988
Good Friday Fri 1 Apr 1988
Tiradentes Thu 21 Apr 1988
Labour Day Sun 1 May 1988
Corpus Christi Thu 2 Jun 1988
Independence Day Wed 7 Sep 1988
Our Lady of Aparecida Wed 12 Oct 1988
All Souls' Day Wed 2 Nov 1988
Republic Proclamation Day Tue 15 Nov 1988
Black Awareness Day Sun 20 Nov 1988
Christmas Day Sun 25 Dec 1988
New Year's Day Sun 1 Jan 1989
Carnival Monday Mon 6 Feb 1989
Carnival Tuesday Tue 7 Feb 1989
Good Friday Fri 24 Mar 1989
Tiradentes Fri 21 Apr 1989
Labour Day Mon 1 May 1989
Corpus Christi Thu 25 May 1989
Independence Day Thu 7 Sep 1989
Our Lady of Aparecida Thu 12 Oct 1989
All Souls' Day Thu 2 Nov 1989
Republic Proclamation Day Wed 15 Nov 1989
Black Awareness Day Mon 20 Nov 1989
Christmas Day Mon 25 Dec 1989
New Year's Day Mon 1 Jan 1990
Carnival Monday Mon 26 Feb 1990
Carnival Tuesday Tue 27 Feb 1990
Good Friday Fri 13 Apr 1990
Tiradentes Sat 21 Apr 1990
Labour Day Tue 1 May 1990
Corpus Christi Thu 14 Jun 1990
Independence Day Fri 7 Sep 1990
Our Lady of Aparecida Fri 12 Oct 1990
All Souls' Day Fri 2 Nov 1990
Republic Proclamation Day Thu 15 Nov 1990
Black Awareness Day Tue 20 Nov 1990
Christmas Day Tue 25 Dec 1990
New Year's Day Tue 1 Jan 1991
Carnival Monday Mon 11 Feb 1991
Carnival Tuesday Tue 12 Feb 1991
Good Friday Fri 29 Mar 1991
Tiradentes Sun 21 Apr 1991
Labour Day Wed 1 May 1991
Corpus Christi Thu 30 May 1991
Independence Day Sat 7 Sep 1991
Our Lady of Aparecida Sat 12 Oct 1991
All Souls' Day Sat 2 Nov 1991
Republic Proclamation Day Fri 15 Nov 1991
Black Awareness Day Wed 20 Nov 1991
Christmas Day Wed 25 Dec 1991
New Year's Day Wed 1 Jan 1992
Carnival Monday Mon 2 Mar 1992
Carnival Tuesday Tue 3 Mar 1992
Good Friday Fri 17 Apr 1992
Tiradentes Tue 21 Apr 1992
Labour Day Fri 1 May 1992
Corpus Christi Thu 18 Jun 1992
Independence Day Mon 7 Sep 1992
Our Lady of Aparecida Mon 12 Oct 1992
All Souls' Day Mon 2 Nov 1992
Republic Proclamation Day Sun 15 Nov 1992
Black Awareness Day Fri 20 Nov 1992
Christmas Day Fri 25 Dec 1992
New Year's Day Fri 1 Jan 1993
Carnival Monday Mon 22 Feb 1993
Carnival Tuesday Tue 23 Feb 1993
Good Friday Fri 9 Apr 1993
Tiradentes Wed 21 Apr 1993
Labour Day Sat 1 May 1993
Corpus Christi Thu 10 Jun 1993
Independence Day Tue 7 Sep 1993
Our Lady of Aparecida Tue 12 Oct 1993
All Souls' Day Tue 2 Nov 1993
Republic Proclamation Day Mon 15 Nov 1993
Black Awareness Day Sat 20 Nov 1993
Christmas Day Sat 25 Dec 1993
New Year's Day Sat 1 Jan 1994
Carnival Monday Mon 14 Feb 1994
Carnival Tuesday Tue 15 Feb 1994
Good Friday Fri 1 Apr 1994
Tiradentes Thu 21 Apr 1994
Labour Day Sun 1 May 1994
Corpus Christi Thu 2 Jun 1994
Independence Day Wed 7 Sep 1994
Our Lady of Aparecida Wed 12 Oct 1994
All Souls' Day Wed 2 Nov 1994
Republic Proclamation Day Tue 15 Nov 1994
Black Awareness Day Sun 20 Nov 1994
Christmas Day Sun 25 Dec 1994
New Year's Day Sun 1 Jan 1995
Carnival Monday Mon 27 Feb 1995
Carnival Tuesday Tue 28 Feb 1995
Good Friday Fri 14 Apr 1995
Tiradentes Fri 21 Apr 1995
Labour Day Mon 1 May 1995
Corpus Christi Thu 15 Jun 1995
Independence Day Thu 7 Sep 1995
Our Lady of Aparecida Thu 12 Oct 1995
All Souls' Day Thu 2 Nov 1995
Republic Proclamation Day Wed 15 Nov 1995
Black Awareness Day Mon 20 Nov 1995
Christmas Day Mon 25 Dec 1995
New Year's Day Mon 1 Jan 1996
Carnival Monday Mon 19 Feb 1996
Carnival Tuesday Tue 20 Feb 1996
Good Friday Fri 5 Apr 1996
Tiradentes Sun 21 Apr 1996
Labour Day Wed 1 May 1996
Corpus Christi Thu 6 Jun 1996
Independence Day Sat 7 Sep 1996
Our Lady of Aparecida Sat 12 Oct 1996
All Souls' Day Sat 2 Nov 1996
Republic Proclamation Day Fri 15 Nov 1996
Black Awareness Day Wed 20 Nov 1996
Christmas Day Wed 25 Dec 1996
New Year's Day Wed 1 Jan 1997
Carnival Monday Mon 10 Feb 1997
Carnival Tuesday Tue 11 Feb 1997
Good Friday Fri 28 Mar 1997
Tiradentes Mon 21 Apr 1997
Labour Day Thu 1 May 1997
Corpus Christi Thu 29 May 1997
Independence Day Sun 7 Sep 1997
Our Lady of Aparecida Sun 12 Oct 1997
All Souls' Day Sun 2 Nov 1997
Republic Proclamation Day Sat 15 Nov 1997
Black Awareness Day Thu 20 Nov 1997
Christmas Day Thu 25 Dec 1997
New Year's Day Thu 1 Jan 1998
Carnival Monday Mon 23 Feb 1998
Carnival Tuesday Tue 24 Feb 1998
Good Friday Fri 10 Apr 1998
Tiradentes Tue 21 Apr 1998
Labour Day Fri 1 May 1998
Corpus Christi Thu 11 Jun 1998
Independence Day Mon 7 Sep 1998
Our Lady of Aparecida Mon 12 Oct 1998
All Souls' Day Mon 2 Nov 1998
Republic Proclamation Day Sun 15 Nov 1998
Black Awareness Day Fri 20 Nov 1998
Christmas Day Fri 25 Dec 1998
New Year's Day Fri 1 Jan 1999
Carnival Monday Mon 15 Feb 1999
Carnival Tuesday Tue 16 Feb 1999
Good Friday Fri 2 Apr 1999
Tiradentes Wed 21 Apr 1999
Labour Day Sat 1 May 1999
Corpus Christi Thu 3 Jun 1999
Independence Day Tue 7 Sep 1999
Our Lady of Aparecida Tue 12 Oct 1999
All Souls' Day Tue 2 Nov 1999
Republic Proclamation Day Mon 15 Nov 1999
Black Awareness Day Sat 20 Nov 1999
Christmas Day Sat 25 Dec 1999
New Year's Day Sat 1 Jan 2000
Carnival Monday Mon 6 Mar 2000
Carnival Tuesday Tue 7 Mar 2000
Tiradentes Fri 21 Apr 2000
Good Friday Fri 21 Apr 2000
Labour Day Mon 1 May 2000
Corpus Christi Thu 22 Jun 2000
Independence Day Thu 7 Sep 2000
Our Lady of Aparecida Thu 12 Oct 2000
All Souls' Day Thu 2 Nov 2000
Republic Proclamation Day Wed 15 Nov 2000
Black Awareness Day Mon 20 Nov 2000
Christmas Day Mon 25 Dec 2000
New Year's Day Mon 1 Jan 2001
Carnival Monday Mon 26 Feb 2001
Carnival Tuesday Tue 27 Feb 2001
Good Friday Fri 13 Apr 2001
Tiradentes Sat 21 Apr 2001
Labour Day Tue 1 May 2001
Corpus Christi Thu 14 Jun 2001
Independence Day Fri 7 Sep 2001
Our Lady of Aparecida Fri 12 Oct 2001
All Souls' Day Fri 2 Nov 2001
Republic Proclamation Day Thu 15 Nov 2001
Black Awareness Day Tue 20 Nov 2001
Christmas Day Tue 25 Dec 2001
New Year's Day Tue 1 Jan 2002
Carnival Monday Mon 11 Feb 2002
Carnival Tuesday Tue 12 Feb 2002
Good Friday Fri 29 Mar 2002
Tiradentes Sun 21 Apr 2002
Labour Day Wed 1 May 2002
Corpus Christi Thu 30 May 2002
Independence Day Sat 7 Sep 2002
Our Lady of Aparecida Sat 12 Oct 2002
All Souls' Day Sat 2 Nov 2002
Republic Proclamation Day Fri 15 Nov 2002
Black Awareness Day Wed 20 Nov 2002
Christmas Day Wed 25 Dec 2002
New Year's Day Wed 1 Jan 2003
Carnival Monday Mon 3 Mar 2003
Carnival Tuesday Tue 4 Mar 2003
Good Friday Fri 18 Apr 2003
Tiradentes Mon 21 Apr 2003
Labour Day Thu 1 May 2003
Corpus Christi Thu 19 Jun 2003
Independence Day Sun 7 Sep 2003
Our Lady of Aparecida Sun 12 Oct 2003
All Souls' Day Sun 2 Nov 2003
Republic Proclamation Day Sat 15 Nov 2003
Black Awareness Day Thu 20 Nov 2003
Christmas Day Thu 25 Dec 2003
New Year's Day Thu 1 Jan 2004
Carnival Monday Mon 23 Feb 2004
Carnival Tuesday Tue 24 Feb 2004
Good Friday Fri 9 Apr 2004
Tiradentes Wed 21 Apr 2004
Labour Day Sat 1 May 2004
Corpus Christi Thu 10 Jun 2004
Independence Day Tue 7 Sep 2004
Our Lady of Aparecida Tue 12 Oct 2004
All Souls' Day Tue 2 Nov 2004
Republic Proclamation Day Mon 15 Nov 2004
Black Awareness Day Sat 20 Nov 2004
Christmas Day Sat 25 Dec 2004
New Year's Day Sat 1 Jan 2005
Carnival Monday Mon 7 Feb 2005
Carnival Tuesday Tue 8 Feb 2005
Good Friday Fri 25 Mar 2005
Tiradentes Thu 21 Apr 2005
Labour Day Sun 1 May 2005
Corpus Christi Thu 26 May 2005
Independence Day Wed 7 Sep 2005
Our Lady of Aparecida Wed 12 Oct 2005
All Souls' Day Wed 2 Nov 2005
Republic Proclamation Day Tue 15 Nov 2005
Black Awareness Day Sun 20 Nov 2005
Christmas Day Sun 25 Dec 2005
New Year's Day Sun 1 Jan 2006
Carnival Monday Mon 27 Feb 2006
Carnival Tuesday Tue 28 Feb 2006
Good Friday Fri 14 Apr 2006
Tiradentes Fri 21 Apr 2006
Labour Day Mon 1 May 2006
Corpus Christi Thu 15 Jun 2006
Independence Day Thu 7 Sep 2006
Our Lady of Aparecida Thu 12 Oct 2006
All Souls' Day Thu 2 Nov 2006
Republic Proclamation Day Wed 15 Nov 2006
Black Awareness Day Mon 20 Nov 2006
Christmas Day Mon 25 Dec 2006
New Year's Day Mon 1 Jan 2007
Carnival Monday Mon 19 Feb 2007
Carnival Tuesday Tue 20 Feb 2007
Good Friday Fri 6 Apr 2007
Tiradentes Sat 21 Apr 2007
Labour Day Tue 1 May 2007
Corpus Christi Thu 7 Jun 2007
Independence Day Fri 7 Sep 2007
Our Lady of Aparecida Fri 12 Oct 2007
All Souls' Day Fri 2 Nov 2007
Republic Proclamation Day Thu 15 Nov 2007
Black Awareness Day Tue 20 Nov 2007
Christmas Day Tue 25 Dec 2007
New Year's Day Tue 1 Jan 2008
Carnival Monday Mon 4 Feb 2008
Carnival Tuesday Tue 5 Feb 2008
Good Friday Fri 21 Mar 2008
Tiradentes Mon 21 Apr 2008
Labour Day Thu 1 May 2008
Corpus Christi Thu 22 May 2008
Independence Day Sun 7 Sep 2008
Our Lady of Aparecida Sun 12 Oct 2008
All Souls' Day Sun 2 Nov 2008
Republic Proclamation Day Sat 15 Nov 2008
Black Awareness Day Thu 20 Nov 2008
Christmas Day Thu 25 Dec 2008
New Year's Day Thu 1 Jan 2009
Carnival Monday Mon 23 Feb 2009
Carnival Tuesday Tue 24 Feb 2009
Good Friday Fri 10 Apr 2009
Tiradentes Tue 21 Apr 2009
Labour Day Fri 1 May 2009
Corpus Christi Thu 11 Jun 2009
Independence Day Mon 7 Sep 2009
Our Lady of Aparecida Mon 12 Oct 2009
All Souls' Day Mon 2 Nov 2009
Republic Proclamation Day Sun 15 Nov 2009
Black Awareness Day Fri 20 Nov 2009
Christmas Day Fri 25 Dec 2009
New Year's Day Fri 1 Jan 2010
Carnival Monday Mon 15 Feb 2010
Carnival Tuesday Tue 16 Feb 2010
Good Friday Fri 2 Apr 2010
Tiradentes Wed 21 Apr 2010
Labour Day Sat 1 May 2010
Corpus Christi Thu 3 Jun 2010
Independence Day Tue 7 Sep 2010
Our Lady of Aparecida Tue 12 Oct 2010
All Souls' Day Tue 2 Nov 2010
Republic Proclamation Day Mon 15 Nov 2010
Black Awareness Day Sat 20 Nov 2010
Christmas Day Sat 25 Dec 2010
New Year's Day Sat 1 Jan 2011
Carnival Monday Mon 7 Mar 2011
Carnival Tuesday Tue 8 Mar 2011
Tiradentes Thu 21 Apr 2011
Good Friday Fri 22 Apr 2011
Labour Day Sun 1 May 2011
Corpus Christi Thu 23 Jun 2011
Independence Day Wed 7 Sep 2011
Our Lady of Aparecida Wed 12 Oct 2011
All Souls' Day Wed 2 Nov 2011
Republic Proclamation Day Tue 15 Nov 2011
Black Awareness Day Sun 20 Nov 2011
Christmas Day Sun 25 Dec 2011
New Year's Day Sun 1 Jan 2012
Carnival Monday Mon 20 Feb 2012
Carnival Tuesday Tue 21 Feb 2012
Good Friday Fri 6 Apr 2012
Tiradentes Sat 21 Apr 2012
Labour Day Tue 1 May 2012
Corpus Christi Thu 7 Jun 2012
Independence Day Fri 7 Sep 2012
Our Lady of Aparecida Fri 12 Oct 2012
All Souls' Day Fri 2 Nov 2012
Republic Proclamation Day Thu 15 Nov 2012
Black Awareness Day Tue 20 Nov 2012
Christmas Day Tue 25 Dec 2012
New Year's Day Tue 1 Jan 2013
Carnival Monday Mon 11 Feb 2013
Carnival Tuesday Tue 12 Feb 2013
Good Friday Fri 29 Mar 2013
Tiradentes Sun 21 Apr 2013
Labour Day Wed 1 May 2013
Corpus Christi Thu 30 May 2013
Independence Day Sat 7 Sep 2013
Our Lady of Aparecida Sat 12 Oct 2013
All Souls' Day Sat 2 Nov 2013
Republic Proclamation Day Fri 15 Nov 2013
Black Awareness Day Wed 20 Nov 2013
Christmas Day Wed 25 Dec 2013
New Year's Day Wed 1 Jan 2014
Carnival Monday Mon 3 Mar 2014
Carnival Tuesday Tue 4 Mar 2014
Good Friday Fri 18 Apr 2014
Tiradentes Mon 21 Apr 2014
Labour Day Thu 1 May 2014
Corpus Christi Thu 19 Jun 2014
Independence Day Sun 7 Sep 2014
Our Lady of Aparecida Sun 12 Oct 2014
All Souls' Day Sun 2 Nov 2014
Republic Proclamation Day Sat 15 Nov 2014
Black Awareness Day Thu 20 Nov 2014
Christmas Day Thu 25 Dec 2014
New Year's Day Thu 1 Jan 2015
Carnival Monday Mon 16 Feb 2015
Carnival Tuesday Tue 17 Feb 2015
Good Friday Fri 3 Apr 2015
Tiradentes Tue 21 Apr 2015
Labour Day Fri 1 May 2015
Corpus Christi Thu 4 Jun 2015
Independence Day Mon 7 Sep 2015
Our Lady of Aparecida Mon 12 Oct 2015
All Souls' Day Mon 2 Nov 2015
Republic Proclamation Day Sun 15 Nov 2015
Black Awareness Day Fri 20 Nov 2015
Christmas Day Fri 25 Dec 2015
New Year's Day Fri 1 Jan 2016
Carnival Monday Mon 8 Feb 2016
Carnival Tuesday Tue 9 Feb 2016
Good Friday Fri 25 Mar 2016
Tiradentes Thu 21 Apr 2016
Labour Day Sun 1 May 2016
Corpus Christi Thu 26 May 2016
Independence Day Wed 7 Sep 2016
Our Lady of Aparecida Wed 12 Oct 2016
All Souls' Day Wed 2 Nov 2016
Republic Proclamation Day Tue 15 Nov 2016
Black Awareness Day Sun 20 Nov 2016
Christmas Day Sun 25 Dec 2016
New Year's Day Sun 1 Jan 2017
Carnival Monday Mon 27 Feb 2017
Carnival Tuesday Tue 28 Feb 2017
Good Friday Fri 14 Apr 2017
Tiradentes Fri 21 Apr 2017
Labour Day Mon 1 May 2017
Corpus Christi Thu 15 Jun 2017
Independence Day Thu 7 Sep 2017
Our Lady of Aparecida Thu 12 Oct 2017
All Souls' Day Thu 2 Nov 2017
Republic Proclamation Day Wed 15 Nov 2017
Black Awareness Day Mon 20 Nov 2017
Christmas Day Mon 25 Dec 2017
New Year's Day Mon 1 Jan 2018
Carnival Monday Mon 12 Feb 2018
Carnival Tuesday Tue 13 Feb 2018
Good Friday Fri 30 Mar 2018
Tiradentes Sat 21 Apr 2018
Labour Day Tue 1 May 2018
Corpus Christi Thu 31 May 2018
Independence Day Fri 7 Sep 2018
Our Lady of Aparecida Fri 12 Oct 2018
All Souls' Day Fri 2 Nov 2018
Republic Proclamation Day Thu 15 Nov 2018
Black Awareness Day Tue 20 Nov 2018
Christmas Day Tue 25 Dec 2018
New Year's Day Tue 1 Jan 2019
Carnival Monday Mon 4 Mar 2019
Carnival Tuesday Tue 5 Mar 2019
Good Friday Fri 19 Apr 2019
Tiradentes Sun 21 Apr 2019
Labour Day Wed 1 May 2019
Corpus Christi Thu 20 Jun 2019
Independence Day Sat 7 Sep 2019
Our Lady of Aparecida Sat 12 Oct 2019
All Souls' Day Sat 2 Nov 2019
Republic Proclamation Day Fri 15 Nov 2019
Black Awareness Day Wed 20 Nov 2019
Christmas Day Wed 25 Dec 2019
New Year's Day Wed 1 Jan 2020
Carnival Monday Mon 24 Feb 2020
Carnival Tuesday Tue 25 Feb 2020
Good Friday Fri 10 Apr 2020
Tiradentes Tue 21 Apr 2020
Labour Day Fri 1 May 2020
Corpus Christi Thu 11 Jun 2020
Independence Day Mon 7 Sep 2020
Our Lady of Aparecida Mon 12 Oct 2020
All Souls' Day Mon 2 Nov 2020
Republic Proclamation Day Sun 15 Nov 2020
Black Awareness Day Fri 20 Nov 2020
Christmas Day Fri 25 Dec 2020
New Year's Day Fri 1 Jan 2021
Carnival Monday Mon 15 Feb 2021
Carnival Tuesday Tue 16 Feb 2021
Good Friday Fri 2 Apr 2021
Tiradentes Wed 21 Apr 2021
Labour Day Sat 1 May 2021
Corpus Christi Thu 3 Jun 2021
Independence Day Tue 7 Sep 2021
Our Lady of Aparecida Tue 12 Oct 2021
All Souls' Day Tue 2 Nov 2021
Republic Proclamation Day Mon 15 Nov 2021
Black Awareness Day Sat 20 Nov 2021
Christmas Day Sat 25 Dec 2021
New Year's Day Sat 1 Jan 2022
Carnival Monday Mon 28 Feb 2022
Carnival Tuesday Tue 1 Mar 2022
Good Friday Fri 15 Apr 2022
Tiradentes Thu 21 Apr 2022
Labour Day Sun 1 May 2022
Corpus Christi Thu 16 Jun 2022
Independence Day Wed 7 Sep 2022
Our Lady of Aparecida Wed 12 Oct 2022
All Souls' Day Wed 2 Nov 2022
Republic Proclamation Day Tue 15 Nov 2022
Black Awareness Day Sun 20 Nov 2022
Christmas Day Sun 25 Dec 2022
New Year's Day Sun 1 Jan 2023
Carnival Monday Mon 20 Feb 2023
Carnival Tuesday Tue 21 Feb 2023
Good Friday Fri 7 Apr 2023
Tiradentes Fri 21 Apr 2023
Labour Day Mon 1 May 2023
Corpus Christi Thu 8 Jun 2023
Independence Day Thu 7 Sep 2023
Our Lady of Aparecida Thu 12 Oct 2023
All Souls' Day Thu 2 Nov 2023
Republic Proclamation Day Wed 15 Nov 2023
Black Awareness Day Mon 20 Nov 2023
Christmas Day Mon 25 Dec 2023
New Year's Day Mon 1 Jan 2024
Carnival Monday Mon 12 Feb 2024
Carnival Tuesday Tue 13 Feb 2024
Good Friday Fri 29 Mar 2024
Tiradentes Sun 21 Apr 2024
Labour Day Wed 1 May 2024
Corpus Christi Thu 30 May 2024
Independence Day Sat 7 Sep 2024
Our Lady of Aparecida Sat 12 Oct 2024
All Souls' Day Sat 2 Nov 2024
Republic Proclamation Day Fri 15 Nov 2024
Black Awareness Day Wed 20 Nov 2024
Christmas Day Wed 25 Dec 2024
New Year's Day Wed 1 Jan 2025
Carnival Monday Mon 3 Mar 2025
Carnival Tuesday Tue 4 Mar 2025
Good Friday Fri 18 Apr 2025
Tiradentes Mon 21 Apr 2025
Labour Day Thu 1 May 2025
Corpus Christi Thu 19 Jun 2025
Independence Day Sun 7 Sep 2025
Our Lady of Aparecida Sun 12 Oct 2025
All Souls' Day Sun 2 Nov 2025
Republic Proclamation Day Sat 15 Nov 2025
Black Awareness Day Thu 20 Nov 2025
Christmas Day Thu 25 Dec 2025
New Year's Day Thu 1 Jan 2026
Carnival Monday Mon 16 Feb 2026
Carnival Tuesday Tue 17 Feb 2026
Good Friday Fri 3 Apr 2026
Tiradentes Tue 21 Apr 2026
Labour Day Fri 1 May 2026
Corpus Christi Thu 4 Jun 2026

Preguntas frecuentes

What counts as a business day?

In CivicCalendar a business day is a Monday–Friday that is not a legal holiday in Brasil. Saturdays and Sundays are not counted.

Is the start day included?

Yes. In “Between two dates” mode both dates are inclusive. In “Add business days”, counting starts on the start date if that date is a business day.

Are regional holidays considered?

National holidays and regional holidays defined for the country are used. If a regional holiday does not apply to your area, the result may differ.

Is this an official calculation?

It is indicative according to current legislation and calendars loaded on the site. For critical legal or labor deadlines, confirm with the relevant rule or authority.