| A hidden church : the diocese of Achonry 1689-1818 | Swords, Liam | Monograph or Collective Volume | Columba | 1997 |
| A new database of medieval documents: illustrated by some fourteenth-century references to Kells | McCabe, Brian | Article in Journal | | 2011 |
| A newly discovered Prologue of AD 699 to the Easter Table of Victorius of Aquitaine in an unknown Sirmond manuscript | Warntjes, Immo | Article in Journal | | 2010 |
| A newly-discovered Irish and Breton Computistica in Città del Vaticano, BAV, MS Reg. Lat. 123 | Bisagni, Jacopo | Article in Journal | | 2017 |
| A note on the divisions of time in the catalogue of the saints of Ireland | Graff, Eric | Article in Book | | 2015 |
| A Scoto-Irish Cisiojanus | Boyle, Alexander | Article in Journal | | 1980 |
| A seventh century Irish computus from the circle of Cummianus | Ó Cróinín, Dáibhí | Article in Journal | | 1982 |
| A seventh-century Irish computus from the circle of Cummianus | Ó Corráin, Donnchadh | Article in Journal | | 1982 |
| A time and place : two centuries of Irish social life | | Monograph or Collective Volume | National Gallery of Ireland | 2006 |
| Addendum to 'Peritia' 32 (2021) 181-96' | Ó Riain, Pádraig | Article in Journal | | 2022 |
| Al-Khwarizmi's sine tables and a Western table with the Hindu norm of R=150 | Byrne, J. G.Mc Carthy, Daniel P., 1945- | Article in Journal | | 2003 |
| An addition to the Hiberno-Latin canon: De ratione temporum | Howlett, David | Article in Book | | 2017 |
| An Icelandic horizon calendar, key to Vinland | Dix, Byron E.Mavor, James W., Jr | Article in Book | | 1989 |
| An Irish Corpus Astronomiae, being Manus O'Donnell's seventeenth-century version of the Lunario of Geronymo Cortès | Cortés, Jerónimo, d. 1615? | Monograph or Collective Volume | | 1915 |
| An Irish scholar and England: The “Metrical Calendar of Hampson” | Gallagher, Robert | Article in Book | | 2017 |
| Anglo-Irish interactions in a liturgical calendar from Cambridge, Corpus Christi College Library, 405 | Ó Néill, Pádraig P. | Article in Book | | 2015 |
| Archbishop James Ussher (1581–1656) and the history of the Easter controversy | Ó Cróinín, Dáibhí | Article in Book | | 2017 |
| Beliefs in County Down folklore | Buckley, Anthony D. | Article in Book | | 1997 |
| Blood rite : the feast of St Martin in Ireland | Mag Fhloinn, Bill | Monograph or Collective Volume | Academia Scientiarum Fennica | 2016 |
| Calendar of events which have featured locally over the past 1000 years | Cameron, J.Cunningham, JenniferMcAllister, J. | Article in Journal | | 1999 |
| Calendars of stone | Stafford, Lawrence M. | Article in Journal | | 2003 |
| Chronologically confused: Claudius of Turin and the date of Christ’s passion | Nothaft, C. Philipp E. | Article in Book | | 2017 |
| Columbanus and the Easter controversy: theological, social and political contexts | Corning, Caitlin | Article in Book | | 2016 |
| Computus as scientific thought in Ireland and the early medieval west | Warntjes, Immo | Article in Book | | 2016 |
| Curia Regis Rolls of the reign of Henry III, 16 : 21 to 26 Henry III (1237-1242) | | Monograph or Collective Volume | | 1979 |
| Diplomatic elements in Willibrod's autobiography | Pelteret, David A.E.
| Article in Journal | | 2012 |
| Dublin diocesan archives : Murray papers (3) | Purcell, Mary | Article in Journal | | 1983 |
| Easter cycles in the early Irish church | O'Connell, D. J. K. | Article in Journal | | 1936 |
| Easter principles and a fifth-century lunar cycle used in the British Isles | Mc Carthy, Daniel P., 1945- | Article in Journal | | 1993 |
| Epacts in Irish chronicles | Harrison, Kenneth | Article in Journal | | 1978 |
| Episodes in the history of Easter cycles in Ireland | Harrison, Kenneth | Article in Book | | 1982 |
| Fairs and assemblies in Ireland | Lennon, John | Article in Journal | | 1988 |
| Felix of Squillace and the Dionysiac computus II: Rome, Gaul, and the insular world | Cuppo, Luciana | Article in Book | | 2017 |
| Fraughan Sunday, Slieve Bloom Mountains | Ní Dhubhluin, Mairead | Article in Journal | | 2012 |
| Introduction: state of research on late antique and early medieval computus | Warntjes, Immo | Article in Book | | 2017 |
| Irish education in the British parliamentary papers in the nineteenth century and after (1801-1920) | Parkes, Susan M. | Monograph or Collective Volume | Cork University Press, History of Education Society | 1978 |
| Landmarks of the people : Meath and Cavan places prominent in Lughnasa mythology and folklore | Mac Gabhann, Séamus | Article in Journal | | 2000 |
| Late Antique Calendrical Thought and Its reception in the Early Middle Ages: Proceedings from the Third International Conference on the Science of Computus in Ireland and Europe, Galway, 16-18 July, 2010 | | Monograph or Collective Volume | Brepols Publishers | 2017 |
| Lurgan time-line 1610-2010 | McCorry, F.X. (Francis Xavier) | Article in Journal | | 2010 |
| Mó-Sinnu moccu Min and the computus of Bangor | Ó Cróinín, Dáibhí | Article in Journal | | 1982 |
| Myths and marches : history, class and the siege of Derry 1689 | McGovern, Mark | Article in Journal | | 1997 |
| On some Celtic terms for the divisions of the year | Joseph, Lionel S. | Article in Journal | | 2023 |
| On the arrival of the Latercus in Ireland | Mc Carthy, Daniel P., 1945- | Article in Book | | 2011 |
| On the origin of the 5-years cycle in the Celtic calendar | Paarisot, Jean-Paul | Article in Journal | | 1992 |
| Once in four: the leap year in early medieval thought | Smyth, Marina | Article in Book | | 2017 |
| Osterfest und Weltchronistik in den westgotischen Reichen | Englisch, Brigitte | Article in Book | | 2017 |
| Rotulorum patentium et clausorum cancellariae Hiberniae calendarium. 1, pars. 1 : Hen. II-Hen. VII | | Monograph or Collective Volume | | 1828 |
| Seasonal migration to the Lagan and Scotland | O'Dowd, Anne | Article in Book | | 1995 |
| Second Report of the Royal Commission on Historical Manuscripts with appendix, and index to the First and Second Reports. [C. 441] | Royal Commission on Historical Manuscripts | Monograph or Collective Volume | | 1871 |
| Shrovetide and Inid | Walsh, Paul, Revd, 1885-1941 | Article in Journal | | 1941 |
| Tensions over time: Conflicting understanding of monastic prayer in late-eighth-century-Armagh | Rumsey, Patricia | Article in Journal | | 2015 |
| The "lost" Irish 84-year Easter table rediscovered | Mc Carthy, Daniel P., 1945-Ó Cróinín, Dáibhí | Article in Journal | | 1990 |
| The 'real' addressee(s) of Bede's letter to Wicthed | Ohashi, Masako | Article in Book | | 2015 |
| The ancient Celtic year | Lehmacher, Gustav | Article in Journal | | 1950 |
| The ante-Nicene Christian Pasch : De Ratione Paschali - the Paschal tract of Anatolius, bishop of Laodicea | Anatolius, Saint, Bishop of Laodicea. | Monograph or Collective Volume | Four Courts | 2003 |
| The biblical chronology of James Ussher | Mc Carthy, Daniel P., 1945- | Article in Journal | | 1997 |
| The Bon Ton Skellig List | Lehane, Shane | Article in Book | | 2022 |
| The bonfire in north Irish tradition. With appendix by G.B. Adams | Gailey, Alan | Article in Journal | | 1977 |
| The calendar and martyrology of Christ Church cathedral Dublin | Ó Riain, Pádraig | Article in Book | | 2006 |
| The Celtic druid's year : seasonal cycles of the ancient Celts | King, John | Monograph or Collective Volume | Blandford | 1994 |
| The chronology of Saint Columba's life | McCarthy, Daniel P. | Article in Book | | 2015 |
| The Comet and the Flight? | Casway, Jerrold | Article in Journal | | 2013 |
| The earliest Irish 'ordo' (liturgical calendar) 1750 | Reidy, Donal A. | Article in Journal | | 1940 |
| The early ninth-century Karlsruhe Irish Calendar of Saints | Ó Riain, Pádraig | Article in Journal | | 2021 |
| The early Old Irish material in the newly discovered Computus Einsidlensis (c. AD 700) | Bisagni, JacopoWarntjes, Immo | Article in Journal | | 2008 |
| The Easter Controversy of late antiquity and the early middle ages : its manuscripts, texts and tables. Proceedings of the 2nd international conference on the science of computus in Ireland and Europe. Galway, 18-20 July, 2008 | | Monograph or Collective Volume | Brepols | 2011 |
| The emergence of Anno Domini | Mc Carthy, Daniel P., 1945- | Article in Book | | 2003 |
| The first 400 years of the Gregorian calendar | McNally, D. | Article in Journal | | 1983 |
| The harmonization of the lunar year with the Julian calendar of Anatolius, bishop of Laodicea | Mc Carthy, Daniel P., 1945- | Article in Book | | 2012 |
| The holy wells of Ireland | Logan, Patrick | Monograph or Collective Volume | Smythe | 1980 |
| The initial year of De ratione paschali and the relevance of its paschal dates | Zuidhoek, Jan | Article in Book | | 2017 |
| The Irish Background of the Icelandic Calendrical Reform | Males, Mikael | Article in Journal | | 2023 |
| The issue of apostolic authority at the Synod of Whitby | Pelteret, David A. E. | Article in Book | | 2011 |
| The local context of Óenach Tailten | Swift, Catherine | Article in Journal | | 2000 |
| The lunar and paschal tables of De ratione paschali attributed to Anatolius of Laodicea | Mc Carthy, Daniel P., 1945- | Article in Journal | | 1996 |
| The manuscripts of His Grace the Duke of Rutland, G.C.B., preserved at Belvoir Castle, 1 : Letters and papers, c.1440-1641; 2 : Letters and papers, 1642-1771, with miscellaneous documents, c.1600-c.1790, inventories, etc., 1369-1787, and extracts from account books, 1557-1612; 3 : letters and papers, 1771-87; 4 : Charters, cartularies, etc., 12th-16th centuries, with court rolls and pedigrees, letters and papers, 1471-1806, extracts from household accounts, 1522-1700, a list of Sir Thomas Lovell's retinue, 1508, returns of artillery, etc. in the marches of Scotland, 1548-9, and travelling expenses, 1552. 4 vols. | Historical Manuscripts Commission | Monograph or Collective Volume | | 1888 |
| The manuscripts of J.B. Fortescue esq., [formerly] preserved at Dropmore, 1 : Papers of Governor Thomas Pitt, 1698-1709, with Pitt family letters and miscellaneous papers to 1779, and correspondence of Lord Grenville, 1782-90; 2 : Grenville correspondence, 1791-4; 3 : 1795-7, with additions, 1787-96, and index and introduction to this and vol. 2; 4 : 1792-Mar. 1799, concerned mainly with the coalition against France and the civil war in Ireland; 5 : Apr.-Oct. 1799, with additions, 1792-9; 6 : Nov. 1799-Mar. 1801; 7 : Feb. 1801-Feb. 1806; 8 : Jan.-Dec. 1806; 9 : 1807-9, with additions 1806-7, edited by R.F. Isaacson. 10 vols. | Historical Manuscripts Commission | Monograph or Collective Volume | | 1892 |
| The Martyrology of Donegal : a calendar of the saints of Ireland | | Monograph or Collective Volume | Irish Archaeological & Celtic Society | 1864 |
| The martyrology of Tallaght | | Monograph or Collective Volume | | 1931 |
| The Munich computus : text and translation : Irish alternatives to Bede's computistics | Warntjes, Immo | Thesis | | 2007 |
| The Munich Computus : text and translation. Irish computistics between Isidore of Seville and the Venerable Bede and its reception in Carolingian times | Warntjes, Immo | Monograph or Collective Volume | Steiner | 2010 |
| The paschal cycle of St Patrick | Mc Carthy, Daniel | Article in Book | | 2017 |
| The shaping of Ulster Presbyterian belief and practice, 1770-1840 | Holmes, Andrew R., 1977- | Monograph or Collective Volume | Oxford University Press | 2006 |
| The siege of Derry in Ulster protestant mythology | McBride, Ian | Monograph or Collective Volume | Four Courts | 1997 |
| The Skellig Lists | Lehane, Shane | Article in Book | | 2022 |
| The status of the pre-Patrician Irish annals | Mc Carthy, Daniel P., 1945- | Article in Journal | | 1998 |
| Third report of the Royal Commission on Historical Manuscripts, with appendix and index. [C. 673] | Royal Commission on Historical Manuscripts | Monograph or Collective Volume | | 1872 |
| Times and dates | Loughran, Maeve | Article in Journal | | 2010 |
| To choose one Easter from three: Oswiu's decision and the Northumbrian Synod of AD 664 | Dailey, E.T. | Article in Journal | | 2015 |
| Towards a new edition of the Computus of AD 243 | Mosshammer, Alden A. | Article in Book | | 2017 |
| Two Irish jokes|The Irish names in Suadbar's letter (Appendix) | Howlett, DavidIreland, Colin (Appendix) | Article in Book | | 2015 |
| Victorius vs Dionysius : the Irish Easter controversy of AD 689 | Warntjes, Immo | Article in Book | | 2015 |
| What difference a day makes: the eighth day of the week in book 10 of Hrabanus Maurus’ De rerum naturis | Chen Obrist, Lisa | Article in Book | | 2017 |