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Appendix F: Calendar of Church Feast and Fast Days
| Date or extent of feast where more than one day; range of dates for the feast, where it is movable | Feast name in the Old Norse Laws | Language | (Standard) English translation and explanatory notes |
|---|---|---|---|
| 1st February | brigíðarmessa | ON | Feast of St Brigid |
| movable: the Sunday before Ash Wednesday: 1st February–7th March | kötsunnudagher | OSw | Sunday before Lent, Quinquagesima |
| 2nd February | maríumessa recorded as kyndilmessa in a manuscript variant | ON | Purification of the Blessed Virgin Mary |
| kyndilmæssa | OSw | Candlemas | |
| movable: 4th February–10th March | askuoþensdagher | OSw | Ash Wednesday |
| movable: from Ash Wednesday to Holy Saturday (the day before Easter Sunday): 4th February until 21st March–10th March until 24th April | langafasta | ON | Lent |
| movable: 8th February–14th March | hvitisunnudagher (drottins dags i hvita dogum in Grg) | OSw | First Sunday in Lent |
| 22nd February | pétrsmessa | ON | Feast of St Peter (not to be confused with the Feast of SS Peter and Paul, 29th June) |
| 24th February | matthiasmessa | ON | Feast of St Matthias |
| mattíasmessa | ON | An alternative date is 14th May | |
| movable: the Sunday before Palm Sunday: 8th March–11th April | kæra sunnudagher | OSw | Fifth Sunday in Lent, otherwise called Passion Sunday |
| 12th March | gregoriusmessa | ON | Feast of St Gregory |
| movable, starting with Palm Sunday:15th March–18th April | dymbilvika | OSw | Holy Week (the week before Easter) |
| movable: 18th March–21st April | kloknaoþensdagher | OSw | Wednesday in Holy Week, Wednesday next before Easter |
| movable: 19th March–22nd April | skærþorsdagher | OSw | Maundy Thursday |
| skíriþórsdagr | ON | ||
| movable: 20th March–23rd April | langafre(a)dagher | OSw | Good Friday |
| langafrjádagr | ON | ||
| 21st March | benedictusmessa | ON | Feast of St Benedict |
| movable: 22nd March–25th April | paskadagher | OSw | Easter Day |
| páskadagr | ON | Easter Day | |
| movable: 22nd March–25th April | paskar | OSw | Easter season |
| paske | ODan | ||
| páskar | ON | ||
| 25th March | mariumessa i fastu | OGu | Feast of the Annunciation, also called Lady Day |
| maríumessa í föstu | ON | ||
| maríumessa um várit | ON | ||
| varafrudagher (i fastu) | OSw | ||
| 16th April | magnúsmessa | ON | Feast of St Magnus (Erlendsson of Orkney) |
| 23rd April | jóhannesmessa (variant of: jóansmessa) | ON | Feast of St Jón Ögmundarson, bishop of Hólar 1106–21 (celebrated from 1200; cf. note in the translation of Grágás) |
