Radonitsa 2027 is on 11 May 2027 · Tuesday · in 225 days
the Nativity Fast1 January – 6 January
the season after Pentecost7 January – 14 March
Great Lent15 March – 24 April
Holy Week25 April – 1 May
the Pentecostarion (Pascha to Pentecost)2 May – 20 June
the season after Pentecost21 June – 27 June
the Apostles’ Fast28 June – 11 July
the season after Pentecost12 July – 13 August
the Dormition Fast14 August – 27 August
the season after Pentecost28 August – 27 November
the Nativity Fast28 November – 31 December
How the date is found
Radonitsa is 9 days after Easter in the Orthodox calendar. Easter is the first Sunday after the first full moon on or after 21 March, computed by the Julian rule (Meeus’s algorithm, no lookup table).
Easter: Meeus/Jones/Butcher and Meeus’s Julian algorithm (Jean Meeus, Astronomical Algorithms, 1991). Feast offsets as in the General Roman Calendar and the Orthodox Triodion/Pentecostarion.