December

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2             Bl Raphael Chyliński, Presbyter Optional memorial
In the Archdiocese of Łódź:
Bl Raphael Chyliński, Presbyter Obligatory memorial
3             St Francis Xavier, Presbyter Obligatory memorial
4             St John of Damascene, Presbyter and Doctor of the Church Optional memorial
St Barbara, Virgin and Martyr Optional memorial
In the Archdiocese of Katowice:
St Barbara, Virgin and Martyr, patron of the diocese Obligatory memorial
In the Dioceses of Gliwice and Sosnowiec:
St Barbara, Virgin and Martyr Obligatory memorial
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6             St Nicholas, Bishop Optional memorial
7             St Ambrose, Bishop and Doctor of the Church Obligatory memorial
8             The IMMACULATE CONCEPTION of the BLESSED VIRGIN MARY Solemnity
9   St Juan Diego Cuauhtlatoatzin Optional memorial
10 In the Diocese of Warszawa-Praga:
Our Lady of Loreto Obligatory memorial
11           St Damasus I, Pope Optional memorial
12           Our Lady of Guadalupe Optional memorial
13           St Lucy, Virgin and Martyr Obligatory memorial
14           St John of the Cross, Presbyter and Doctor of the Church Obligatory memorial
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21           St Peter Canisius, Presbyter and Doctor of the Church Optional memorial
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25           The NATIVITY of the LORD Solemnity
26           ST STEPHEN, the first Martyr Feast
27           ST JOHN, Apostle and Evangelist Feast
28           The HOLY INNOCENTS, Martyrs Feast
29           St Thomas à Becket, Bishop and Martyr Optional memorial
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31           St Sylvester I, Pope Optional memorial
The Sunday within the Octave of Christmas. If 25 December, and thereby 1 January, falls on a Sunday, the feast is celebrated on 30 December:
The HOLY FAMILY of JESUS, MARY and JOSEPH Feast