See every month of any year with all Brazilian national holidays marked — fixed and moveable, derived from Easter.
Brazil has nine fixed national holidays set by federal law and four moveable ones derived from the date of Easter. The fixed holidays — New Year, Tiradentes, Labour Day, Independence Day, Our Lady of Aparecida, All Souls, Republic Day, Black Awareness Day and Christmas — fall on the same date every year. The moveable ones — Carnival Monday and Tuesday, Good Friday and Corpus Christi — shift with the lunar calendar because they are counted from Easter, which the Western church computes with the Computus algorithm published by Gauss.
This calendar shows all thirteen national holidays for any year from 1900 to 2100. Carnival is 47 days before Easter, Good Friday is 2 days before, and Corpus Christi is 60 days after. The computation is embedded in the page using the Anonymous Gregorian variant of the algorithm, the same one used by astronomical tables. State and municipal holidays are not included because they vary by location — São Paulo has January 25, Rio has March 1, and so on — and including them without knowing where the user is would be misleading.
Everything runs in your browser. The calendar is drawn by JavaScript from the holiday formulas in the page. No request is made to any server, and nothing you type is logged or stored. The source for the fixed holidays is federal legislation, and the moveable dates are derived from pure arithmetic.
Easter (Computus): a = year mod 19, b = floor(year/100), c = year mod 100, d = floor(b/4), e = b mod 4, f = floor((b+8)/25), g = floor((b−f+1)/3), h = (19a + b − d − g + 15) mod 30, i = floor(c/4), k = c mod 4, l = (32 + 2e + 2i − h − k) mod 7, m = floor((a + 11h + 22l)/451), month = floor((h+l−7m+114)/31), day = ((h+l−7m+114) mod 31) + 1. Carnival = Easter − 47, Good Friday = Easter − 2, Corpus Christi = Easter + 60.
Because it is counted from Easter, which depends on the first full moon after the spring equinox. The algorithm (Computus) produces a date between March 22 and April 25, and Carnival falls 47 days before.
No. Only the 13 national holidays set by federal law are shown. State and municipal holidays vary by location and are not on this calendar.
Yes, since 2023. Lei 14.759/2023 made it a national holiday. Before that it was a state or municipal holiday in most places.
No. The calendar is computed in JavaScript from the Computus formula. Nothing is uploaded or stored.
From 1900 to 2100. The Computus algorithm works for any year in the Gregorian calendar, but the holiday laws obviously only apply while they are in force.
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