This file is indexed.

/usr/share/calendar/calendar.christian is in bsdmainutils 8.2.3ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

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/*
 * Christian
 *
 * $FreeBSD$
 */

#ifndef _calendar_christian_
#define _calendar_christian_

LANG=UTF-8

01/05	Last (twelfth) day of Christmastide
01/06	Epiphany
Easter-47	Shrove Tuesday / Mardi Gras (day before Ash Wednesday)
Easter-46	Ash Wednesday (First day of Lent)
Easter-7	Palm Sunday (7 days before Easter)
Easter-3	Maundy Thursday (3 days before Easter)
Easter-2	Good Friday (2 days before Easter)
Easter	Easter Sunday
Easter+39	Ascension Day (10 days before Pentecost)
Easter+49	Pentecost (Whitsunday)
Easter+50	Whitmonday
Easter+56	Trinity Sunday (7 days after Pentecost)
Easter+60	Corpus Christi (11 days after Pentecost)
05/28*	Rogation Sunday
/* 10/18	Feast Day of St. Luke */
11/SunLast	First Sunday of Advent (4th Sunday before Christmas)
12/SunFirst	First Sunday of Advent (4th Sunday before Christmas)
12/06	St. Nicholas' Day
12/24	Christmas Eve
12/25	Christmastide begins: First day of Christmas
12/26	Second day of Christmas (Boxing Day)

Easter+1       Easter Monday

Jan 01	Circumcision of Christ
Jan 25	Conversion of St Paul
Feb 02	Purification of the Virgin Mary
Feb 24	St Matthias
Mar 25	Annunciation of the Virgin Mary
Apr 25	St Mark
May 01	St Philip and St James
Jun 11	St Barnabas
Jun 24	St John the Baptist
Jun 29	St Peter
Jul 25	St James
Aug 24	St Bartholomew
Sep 21	St Matthew
Sep 29	St Michael and all angels
Oct 18	St. Luke
Oct 28	St Simon and St Jude
Nov 01	All Saints
Nov 30	St Andrew
Dec 21	St Thomas
Dec 26	St Stephen (Boxing Day)
Dec 27	St John the Evangelist
Dec 28	Holy Innocents


#endif /* !_calendar_christian_ */