España

Business days calculator

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

Between two dates Add business days

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

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

13527

business days

From July 26, 2026 to December 6, 2079

Business day 13527
Weekend 5569
Holidays 396

19492 days in the period

19492

Total days

5569

Weekend

396

Holidays

Holidays in the period

Assumption Sat 15 Aug 2026
National Day of Spain Mon 12 Oct 2026
All Saints' Day Sun 1 Nov 2026
Constitution Day Sun 6 Dec 2026
Immaculate Conception Tue 8 Dec 2026
Christmas Day Fri 25 Dec 2026
New Year's Day Fri 1 Jan 2027
Epiphany Wed 6 Jan 2027
Good Friday Fri 26 Mar 2027
Labour Day Sat 1 May 2027
Assumption Sun 15 Aug 2027
National Day of Spain Tue 12 Oct 2027
All Saints' Day Mon 1 Nov 2027
Constitution Day Mon 6 Dec 2027
Immaculate Conception Wed 8 Dec 2027
Christmas Day Sat 25 Dec 2027
New Year's Day Sat 1 Jan 2028
Epiphany Thu 6 Jan 2028
Good Friday Fri 14 Apr 2028
Labour Day Mon 1 May 2028
Assumption Tue 15 Aug 2028
National Day of Spain Thu 12 Oct 2028
All Saints' Day Wed 1 Nov 2028
Constitution Day Wed 6 Dec 2028
Immaculate Conception Fri 8 Dec 2028
Christmas Day Mon 25 Dec 2028
New Year's Day Mon 1 Jan 2029
Epiphany Sat 6 Jan 2029
Good Friday Fri 30 Mar 2029
Labour Day Tue 1 May 2029
Assumption Wed 15 Aug 2029
National Day of Spain Fri 12 Oct 2029
All Saints' Day Thu 1 Nov 2029
Constitution Day Thu 6 Dec 2029
Immaculate Conception Sat 8 Dec 2029
Christmas Day Tue 25 Dec 2029
New Year's Day Tue 1 Jan 2030
Epiphany Sun 6 Jan 2030
Good Friday Fri 19 Apr 2030
Labour Day Wed 1 May 2030
Assumption Thu 15 Aug 2030
National Day of Spain Sat 12 Oct 2030
All Saints' Day Fri 1 Nov 2030
Constitution Day Fri 6 Dec 2030
Immaculate Conception Sun 8 Dec 2030
Christmas Day Wed 25 Dec 2030
New Year's Day Wed 1 Jan 2031
Epiphany Mon 6 Jan 2031
Good Friday Fri 11 Apr 2031
Labour Day Thu 1 May 2031
Assumption Fri 15 Aug 2031
National Day of Spain Sun 12 Oct 2031
All Saints' Day Sat 1 Nov 2031
Constitution Day Sat 6 Dec 2031
Immaculate Conception Mon 8 Dec 2031
Christmas Day Thu 25 Dec 2031
New Year's Day Thu 1 Jan 2032
Epiphany Tue 6 Jan 2032
Good Friday Fri 26 Mar 2032
Labour Day Sat 1 May 2032
Assumption Sun 15 Aug 2032
National Day of Spain Tue 12 Oct 2032
All Saints' Day Mon 1 Nov 2032
Constitution Day Mon 6 Dec 2032
Immaculate Conception Wed 8 Dec 2032
Christmas Day Sat 25 Dec 2032
New Year's Day Sat 1 Jan 2033
Epiphany Thu 6 Jan 2033
Good Friday Fri 15 Apr 2033
Labour Day Sun 1 May 2033
Assumption Mon 15 Aug 2033
National Day of Spain Wed 12 Oct 2033
All Saints' Day Tue 1 Nov 2033
Constitution Day Tue 6 Dec 2033
Immaculate Conception Thu 8 Dec 2033
Christmas Day Sun 25 Dec 2033
New Year's Day Sun 1 Jan 2034
Epiphany Fri 6 Jan 2034
Good Friday Fri 7 Apr 2034
Labour Day Mon 1 May 2034
Assumption Tue 15 Aug 2034
National Day of Spain Thu 12 Oct 2034
All Saints' Day Wed 1 Nov 2034
Constitution Day Wed 6 Dec 2034
Immaculate Conception Fri 8 Dec 2034
Christmas Day Mon 25 Dec 2034
New Year's Day Mon 1 Jan 2035
Epiphany Sat 6 Jan 2035
Good Friday Fri 23 Mar 2035
Labour Day Tue 1 May 2035
Assumption Wed 15 Aug 2035
National Day of Spain Fri 12 Oct 2035
All Saints' Day Thu 1 Nov 2035
Constitution Day Thu 6 Dec 2035
Immaculate Conception Sat 8 Dec 2035
Christmas Day Tue 25 Dec 2035
New Year's Day Tue 1 Jan 2036
Epiphany Sun 6 Jan 2036
Good Friday Fri 11 Apr 2036
Labour Day Thu 1 May 2036
Assumption Fri 15 Aug 2036
National Day of Spain Sun 12 Oct 2036
All Saints' Day Sat 1 Nov 2036
Constitution Day Sat 6 Dec 2036
Immaculate Conception Mon 8 Dec 2036
Christmas Day Thu 25 Dec 2036
New Year's Day Thu 1 Jan 2037
Epiphany Tue 6 Jan 2037
Good Friday Fri 3 Apr 2037
Labour Day Fri 1 May 2037
Assumption Sat 15 Aug 2037
National Day of Spain Mon 12 Oct 2037
All Saints' Day Sun 1 Nov 2037
Constitution Day Sun 6 Dec 2037
Immaculate Conception Tue 8 Dec 2037
Christmas Day Fri 25 Dec 2037
New Year's Day Fri 1 Jan 2038
Epiphany Wed 6 Jan 2038
Good Friday Fri 23 Apr 2038
Labour Day Sat 1 May 2038
Assumption Sun 15 Aug 2038
National Day of Spain Tue 12 Oct 2038
All Saints' Day Mon 1 Nov 2038
Constitution Day Mon 6 Dec 2038
Immaculate Conception Wed 8 Dec 2038
Christmas Day Sat 25 Dec 2038
New Year's Day Sat 1 Jan 2039
Epiphany Thu 6 Jan 2039
Good Friday Fri 8 Apr 2039
Labour Day Sun 1 May 2039
Assumption Mon 15 Aug 2039
National Day of Spain Wed 12 Oct 2039
All Saints' Day Tue 1 Nov 2039
Constitution Day Tue 6 Dec 2039
Immaculate Conception Thu 8 Dec 2039
Christmas Day Sun 25 Dec 2039
New Year's Day Sun 1 Jan 2040
Epiphany Fri 6 Jan 2040
Good Friday Fri 30 Mar 2040
Labour Day Tue 1 May 2040
Assumption Wed 15 Aug 2040
National Day of Spain Fri 12 Oct 2040
All Saints' Day Thu 1 Nov 2040
Constitution Day Thu 6 Dec 2040
Immaculate Conception Sat 8 Dec 2040
Christmas Day Tue 25 Dec 2040
New Year's Day Tue 1 Jan 2041
Epiphany Sun 6 Jan 2041
Good Friday Fri 19 Apr 2041
Labour Day Wed 1 May 2041
Assumption Thu 15 Aug 2041
National Day of Spain Sat 12 Oct 2041
All Saints' Day Fri 1 Nov 2041
Constitution Day Fri 6 Dec 2041
Immaculate Conception Sun 8 Dec 2041
Christmas Day Wed 25 Dec 2041
New Year's Day Wed 1 Jan 2042
Epiphany Mon 6 Jan 2042
Good Friday Fri 4 Apr 2042
Labour Day Thu 1 May 2042
Assumption Fri 15 Aug 2042
National Day of Spain Sun 12 Oct 2042
All Saints' Day Sat 1 Nov 2042
Constitution Day Sat 6 Dec 2042
Immaculate Conception Mon 8 Dec 2042
Christmas Day Thu 25 Dec 2042
New Year's Day Thu 1 Jan 2043
Epiphany Tue 6 Jan 2043
Good Friday Fri 27 Mar 2043
Labour Day Fri 1 May 2043
Assumption Sat 15 Aug 2043
National Day of Spain Mon 12 Oct 2043
All Saints' Day Sun 1 Nov 2043
Constitution Day Sun 6 Dec 2043
Immaculate Conception Tue 8 Dec 2043
Christmas Day Fri 25 Dec 2043
New Year's Day Fri 1 Jan 2044
Epiphany Wed 6 Jan 2044
Good Friday Fri 15 Apr 2044
Labour Day Sun 1 May 2044
Assumption Mon 15 Aug 2044
National Day of Spain Wed 12 Oct 2044
All Saints' Day Tue 1 Nov 2044
Constitution Day Tue 6 Dec 2044
Immaculate Conception Thu 8 Dec 2044
Christmas Day Sun 25 Dec 2044
New Year's Day Sun 1 Jan 2045
Epiphany Fri 6 Jan 2045
Good Friday Fri 7 Apr 2045
Labour Day Mon 1 May 2045
Assumption Tue 15 Aug 2045
National Day of Spain Thu 12 Oct 2045
All Saints' Day Wed 1 Nov 2045
Constitution Day Wed 6 Dec 2045
Immaculate Conception Fri 8 Dec 2045
Christmas Day Mon 25 Dec 2045
New Year's Day Mon 1 Jan 2046
Epiphany Sat 6 Jan 2046
Good Friday Fri 23 Mar 2046
Labour Day Tue 1 May 2046
Assumption Wed 15 Aug 2046
National Day of Spain Fri 12 Oct 2046
All Saints' Day Thu 1 Nov 2046
Constitution Day Thu 6 Dec 2046
Immaculate Conception Sat 8 Dec 2046
Christmas Day Tue 25 Dec 2046
New Year's Day Tue 1 Jan 2047
Epiphany Sun 6 Jan 2047
Good Friday Fri 12 Apr 2047
Labour Day Wed 1 May 2047
Assumption Thu 15 Aug 2047
National Day of Spain Sat 12 Oct 2047
All Saints' Day Fri 1 Nov 2047
Constitution Day Fri 6 Dec 2047
Immaculate Conception Sun 8 Dec 2047
Christmas Day Wed 25 Dec 2047
New Year's Day Wed 1 Jan 2048
Epiphany Mon 6 Jan 2048
Good Friday Fri 3 Apr 2048
Labour Day Fri 1 May 2048
Assumption Sat 15 Aug 2048
National Day of Spain Mon 12 Oct 2048
All Saints' Day Sun 1 Nov 2048
Constitution Day Sun 6 Dec 2048
Immaculate Conception Tue 8 Dec 2048
Christmas Day Fri 25 Dec 2048
New Year's Day Fri 1 Jan 2049
Epiphany Wed 6 Jan 2049
Good Friday Fri 16 Apr 2049
Labour Day Sat 1 May 2049
Assumption Sun 15 Aug 2049
National Day of Spain Tue 12 Oct 2049
All Saints' Day Mon 1 Nov 2049
Constitution Day Mon 6 Dec 2049
Immaculate Conception Wed 8 Dec 2049
Christmas Day Sat 25 Dec 2049
New Year's Day Sat 1 Jan 2050
Epiphany Thu 6 Jan 2050
Good Friday Fri 8 Apr 2050
Labour Day Sun 1 May 2050
Assumption Mon 15 Aug 2050
National Day of Spain Wed 12 Oct 2050
All Saints' Day Tue 1 Nov 2050
Constitution Day Tue 6 Dec 2050
Immaculate Conception Thu 8 Dec 2050
Christmas Day Sun 25 Dec 2050
New Year's Day Sun 1 Jan 2051
Epiphany Fri 6 Jan 2051
Good Friday Fri 31 Mar 2051
Labour Day Mon 1 May 2051
Assumption Tue 15 Aug 2051
National Day of Spain Thu 12 Oct 2051
All Saints' Day Wed 1 Nov 2051
Constitution Day Wed 6 Dec 2051
Immaculate Conception Fri 8 Dec 2051
Christmas Day Mon 25 Dec 2051
New Year's Day Mon 1 Jan 2052
Epiphany Sat 6 Jan 2052
Good Friday Fri 19 Apr 2052
Labour Day Wed 1 May 2052
Assumption Thu 15 Aug 2052
National Day of Spain Sat 12 Oct 2052
All Saints' Day Fri 1 Nov 2052
Constitution Day Fri 6 Dec 2052
Immaculate Conception Sun 8 Dec 2052
Christmas Day Wed 25 Dec 2052
New Year's Day Wed 1 Jan 2053
Epiphany Mon 6 Jan 2053
Good Friday Fri 4 Apr 2053
Labour Day Thu 1 May 2053
Assumption Fri 15 Aug 2053
National Day of Spain Sun 12 Oct 2053
All Saints' Day Sat 1 Nov 2053
Constitution Day Sat 6 Dec 2053
Immaculate Conception Mon 8 Dec 2053
Christmas Day Thu 25 Dec 2053
New Year's Day Thu 1 Jan 2054
Epiphany Tue 6 Jan 2054
Good Friday Fri 27 Mar 2054
Labour Day Fri 1 May 2054
Assumption Sat 15 Aug 2054
National Day of Spain Mon 12 Oct 2054
All Saints' Day Sun 1 Nov 2054
Constitution Day Sun 6 Dec 2054
Immaculate Conception Tue 8 Dec 2054
Christmas Day Fri 25 Dec 2054
New Year's Day Fri 1 Jan 2055
Epiphany Wed 6 Jan 2055
Good Friday Fri 16 Apr 2055
Labour Day Sat 1 May 2055
Assumption Sun 15 Aug 2055
National Day of Spain Tue 12 Oct 2055
All Saints' Day Mon 1 Nov 2055
Constitution Day Mon 6 Dec 2055
Immaculate Conception Wed 8 Dec 2055
Christmas Day Sat 25 Dec 2055
New Year's Day Sat 1 Jan 2056
Epiphany Thu 6 Jan 2056
Good Friday Fri 31 Mar 2056
Labour Day Mon 1 May 2056
Assumption Tue 15 Aug 2056
National Day of Spain Thu 12 Oct 2056
All Saints' Day Wed 1 Nov 2056
Constitution Day Wed 6 Dec 2056
Immaculate Conception Fri 8 Dec 2056
Christmas Day Mon 25 Dec 2056
New Year's Day Mon 1 Jan 2057
Epiphany Sat 6 Jan 2057
Good Friday Fri 20 Apr 2057
Labour Day Tue 1 May 2057
Assumption Wed 15 Aug 2057
National Day of Spain Fri 12 Oct 2057
All Saints' Day Thu 1 Nov 2057
Constitution Day Thu 6 Dec 2057
Immaculate Conception Sat 8 Dec 2057
Christmas Day Tue 25 Dec 2057
New Year's Day Tue 1 Jan 2058
Epiphany Sun 6 Jan 2058
Good Friday Fri 12 Apr 2058
Labour Day Wed 1 May 2058
Assumption Thu 15 Aug 2058
National Day of Spain Sat 12 Oct 2058
All Saints' Day Fri 1 Nov 2058
Constitution Day Fri 6 Dec 2058
Immaculate Conception Sun 8 Dec 2058
Christmas Day Wed 25 Dec 2058
New Year's Day Wed 1 Jan 2059
Epiphany Mon 6 Jan 2059
Good Friday Fri 28 Mar 2059
Labour Day Thu 1 May 2059
Assumption Fri 15 Aug 2059
National Day of Spain Sun 12 Oct 2059
All Saints' Day Sat 1 Nov 2059
Constitution Day Sat 6 Dec 2059
Immaculate Conception Mon 8 Dec 2059
Christmas Day Thu 25 Dec 2059
New Year's Day Thu 1 Jan 2060
Epiphany Tue 6 Jan 2060
Good Friday Fri 16 Apr 2060
Labour Day Sat 1 May 2060
Assumption Sun 15 Aug 2060
National Day of Spain Tue 12 Oct 2060
All Saints' Day Mon 1 Nov 2060
Constitution Day Mon 6 Dec 2060
Immaculate Conception Wed 8 Dec 2060
Christmas Day Sat 25 Dec 2060
New Year's Day Sat 1 Jan 2061
Epiphany Thu 6 Jan 2061
Good Friday Fri 8 Apr 2061
Labour Day Sun 1 May 2061
Assumption Mon 15 Aug 2061
National Day of Spain Wed 12 Oct 2061
All Saints' Day Tue 1 Nov 2061
Constitution Day Tue 6 Dec 2061
Immaculate Conception Thu 8 Dec 2061
Christmas Day Sun 25 Dec 2061
New Year's Day Sun 1 Jan 2062
Epiphany Fri 6 Jan 2062
Good Friday Fri 24 Mar 2062
Labour Day Mon 1 May 2062
Assumption Tue 15 Aug 2062
National Day of Spain Thu 12 Oct 2062
All Saints' Day Wed 1 Nov 2062
Constitution Day Wed 6 Dec 2062
Immaculate Conception Fri 8 Dec 2062
Christmas Day Mon 25 Dec 2062
New Year's Day Mon 1 Jan 2063
Epiphany Sat 6 Jan 2063
Good Friday Fri 13 Apr 2063
Labour Day Tue 1 May 2063
Assumption Wed 15 Aug 2063
National Day of Spain Fri 12 Oct 2063
All Saints' Day Thu 1 Nov 2063
Constitution Day Thu 6 Dec 2063
Immaculate Conception Sat 8 Dec 2063
Christmas Day Tue 25 Dec 2063
New Year's Day Tue 1 Jan 2064
Epiphany Sun 6 Jan 2064
Good Friday Fri 4 Apr 2064
Labour Day Thu 1 May 2064
Assumption Fri 15 Aug 2064
National Day of Spain Sun 12 Oct 2064
All Saints' Day Sat 1 Nov 2064
Constitution Day Sat 6 Dec 2064
Immaculate Conception Mon 8 Dec 2064
Christmas Day Thu 25 Dec 2064
New Year's Day Thu 1 Jan 2065
Epiphany Tue 6 Jan 2065
Good Friday Fri 27 Mar 2065
Labour Day Fri 1 May 2065
Assumption Sat 15 Aug 2065
National Day of Spain Mon 12 Oct 2065
All Saints' Day Sun 1 Nov 2065
Constitution Day Sun 6 Dec 2065
Immaculate Conception Tue 8 Dec 2065
Christmas Day Fri 25 Dec 2065
New Year's Day Fri 1 Jan 2066
Epiphany Wed 6 Jan 2066
Good Friday Fri 9 Apr 2066
Labour Day Sat 1 May 2066
Assumption Sun 15 Aug 2066
National Day of Spain Tue 12 Oct 2066
All Saints' Day Mon 1 Nov 2066
Constitution Day Mon 6 Dec 2066
Immaculate Conception Wed 8 Dec 2066
Christmas Day Sat 25 Dec 2066
New Year's Day Sat 1 Jan 2067
Epiphany Thu 6 Jan 2067
Good Friday Fri 1 Apr 2067
Labour Day Sun 1 May 2067
Assumption Mon 15 Aug 2067
National Day of Spain Wed 12 Oct 2067
All Saints' Day Tue 1 Nov 2067
Constitution Day Tue 6 Dec 2067
Immaculate Conception Thu 8 Dec 2067
Christmas Day Sun 25 Dec 2067
New Year's Day Sun 1 Jan 2068
Epiphany Fri 6 Jan 2068
Good Friday Fri 20 Apr 2068
Labour Day Tue 1 May 2068
Assumption Wed 15 Aug 2068
National Day of Spain Fri 12 Oct 2068
All Saints' Day Thu 1 Nov 2068
Constitution Day Thu 6 Dec 2068
Immaculate Conception Sat 8 Dec 2068
Christmas Day Tue 25 Dec 2068
New Year's Day Tue 1 Jan 2069
Epiphany Sun 6 Jan 2069
Good Friday Fri 12 Apr 2069
Labour Day Wed 1 May 2069
Assumption Thu 15 Aug 2069
National Day of Spain Sat 12 Oct 2069
All Saints' Day Fri 1 Nov 2069
Constitution Day Fri 6 Dec 2069
Immaculate Conception Sun 8 Dec 2069
Christmas Day Wed 25 Dec 2069
New Year's Day Wed 1 Jan 2070
Epiphany Mon 6 Jan 2070
Good Friday Fri 28 Mar 2070
Labour Day Thu 1 May 2070
Assumption Fri 15 Aug 2070
National Day of Spain Sun 12 Oct 2070
All Saints' Day Sat 1 Nov 2070
Constitution Day Sat 6 Dec 2070
Immaculate Conception Mon 8 Dec 2070
Christmas Day Thu 25 Dec 2070
New Year's Day Thu 1 Jan 2071
Epiphany Tue 6 Jan 2071
Good Friday Fri 17 Apr 2071
Labour Day Fri 1 May 2071
Assumption Sat 15 Aug 2071
National Day of Spain Mon 12 Oct 2071
All Saints' Day Sun 1 Nov 2071
Constitution Day Sun 6 Dec 2071
Immaculate Conception Tue 8 Dec 2071
Christmas Day Fri 25 Dec 2071
New Year's Day Fri 1 Jan 2072
Epiphany Wed 6 Jan 2072
Good Friday Fri 8 Apr 2072
Labour Day Sun 1 May 2072
Assumption Mon 15 Aug 2072
National Day of Spain Wed 12 Oct 2072
All Saints' Day Tue 1 Nov 2072
Constitution Day Tue 6 Dec 2072
Immaculate Conception Thu 8 Dec 2072
Christmas Day Sun 25 Dec 2072
New Year's Day Sun 1 Jan 2073
Epiphany Fri 6 Jan 2073
Good Friday Fri 24 Mar 2073
Labour Day Mon 1 May 2073
Assumption Tue 15 Aug 2073
National Day of Spain Thu 12 Oct 2073
All Saints' Day Wed 1 Nov 2073
Constitution Day Wed 6 Dec 2073
Immaculate Conception Fri 8 Dec 2073
Christmas Day Mon 25 Dec 2073
New Year's Day Mon 1 Jan 2074
Epiphany Sat 6 Jan 2074
Good Friday Fri 13 Apr 2074
Labour Day Tue 1 May 2074
Assumption Wed 15 Aug 2074
National Day of Spain Fri 12 Oct 2074
All Saints' Day Thu 1 Nov 2074
Constitution Day Thu 6 Dec 2074
Immaculate Conception Sat 8 Dec 2074
Christmas Day Tue 25 Dec 2074
New Year's Day Tue 1 Jan 2075
Epiphany Sun 6 Jan 2075
Good Friday Fri 5 Apr 2075
Labour Day Wed 1 May 2075
Assumption Thu 15 Aug 2075
National Day of Spain Sat 12 Oct 2075
All Saints' Day Fri 1 Nov 2075
Constitution Day Fri 6 Dec 2075
Immaculate Conception Sun 8 Dec 2075
Christmas Day Wed 25 Dec 2075
New Year's Day Wed 1 Jan 2076
Epiphany Mon 6 Jan 2076
Good Friday Fri 17 Apr 2076
Labour Day Fri 1 May 2076
Assumption Sat 15 Aug 2076
National Day of Spain Mon 12 Oct 2076
All Saints' Day Sun 1 Nov 2076
Constitution Day Sun 6 Dec 2076
Immaculate Conception Tue 8 Dec 2076
Christmas Day Fri 25 Dec 2076
New Year's Day Fri 1 Jan 2077
Epiphany Wed 6 Jan 2077
Good Friday Fri 9 Apr 2077
Labour Day Sat 1 May 2077
Assumption Sun 15 Aug 2077
National Day of Spain Tue 12 Oct 2077
All Saints' Day Mon 1 Nov 2077
Constitution Day Mon 6 Dec 2077
Immaculate Conception Wed 8 Dec 2077
Christmas Day Sat 25 Dec 2077
New Year's Day Sat 1 Jan 2078
Epiphany Thu 6 Jan 2078
Good Friday Fri 1 Apr 2078
Labour Day Sun 1 May 2078
Assumption Mon 15 Aug 2078
National Day of Spain Wed 12 Oct 2078
All Saints' Day Tue 1 Nov 2078
Constitution Day Tue 6 Dec 2078
Immaculate Conception Thu 8 Dec 2078
Christmas Day Sun 25 Dec 2078
New Year's Day Sun 1 Jan 2079
Epiphany Fri 6 Jan 2079
Good Friday Fri 21 Apr 2079
Labour Day Mon 1 May 2079
Assumption Tue 15 Aug 2079
National Day of Spain Thu 12 Oct 2079
All Saints' Day Wed 1 Nov 2079
Constitution Day Wed 6 Dec 2079

Preguntas frecuentes

What counts as a business day?

In CivicCalendar a business day is a Monday–Friday that is not a legal holiday in España. 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.