Unified Lectionary Comparator

The Triptikon Kalendarium

A forever-free liturgical tool by The Orthodox Snake Writing Agency

Sunday, September 20, 2026

Roman — Latin Rite

25th Sunday in Ordinary Time

Sunday

Sunday Mass

1st rdgIsa 55:6-9
psalmPs 145:2-3, 8-9, 17-18
2nd rdgPhil 1:20c-24, 27a
alleluiacf. Act 16:14b
gospelMatt 20:1-16a

Also on the Calendar

  • Saint Andrew Kim Taegon, Priest, and Paul Chong Hasang and Companions, Martyrs
  • Dorymedons #2
  • Eustachius #3
  • Hypatius #4
  • Asianus #4
  • Adelpretus #5
  • Thomae Johnson #6
  • Francisci Posadas #7
  • Ioannis Caroli Cornay #8
  • Laurentii Han I-hyŏng #9
  • Iosephi Mariae Yermo Parres #10

Ruthenian — Byzantine Catholic

17th Sunday after Pentecost

Tone 8

Divine Liturgy

epistle2 Cor 6:16-18, 7:1
gospelMatt 25:14-30

Also on the Calendar

  • Post-festive day of the Exaltation of the Cross
  • The holy martyr Eustace and his companions
  • The holy martyrs and confessors, the Great Prince Michael, and his counselor Theodore, Wonderworkers of Chernigov
  • Eustathius Placides, His Wife the Martyr Theopiste, and Their Children the Child-martyrs Agapius and Theopistus, of Rome
  • Final Day of the Afterfeast of the Exaltation
  • Michael and His Councilor Theodore, Wonderworkers of Chernígov

Orthodox — Julian Reckoning

Pre-festive Day of the Nativity of the Theotokos

Feast

Divine Liturgy

epistleEph 6:10-17
gospelJohn 15:17-16:2

Also on the Calendar

  • Martyr Sozon of Cilicia
  • Saint John the Wonderworker, Archbishop of Novgorod
  • Venerable Serapion of Spaso-Eleazar Monastery, Pskov
  • Hieromartyr Macarius, Archimandrite of Kanev and Pereyaslavl
  • Apostle Evodius (Euodias) of the Seventy
  • Apostle Onesiphorus of the Seventy
  • Martyr Eupsychius of Caesarea, in Cappadocia
  • Venerable Luke, Abbot of Batheos Ryako
  • Venerable Cloud (Clodoald), Abbot-Founder of Nogent-Sur-Seine near Paris
  • Venerable Macarius of Optina
  • Venerable Cassiani the Hymnographer
  • Sozón of Cilícia
Computed live in your browser from date → Pascha → week position → citation, plus hand-loaded fixed-feast and commemoration data. No data leaves your device.
† commemoration lists: for Roman entries, a bare name plus a number refers to that day's numbered entry in the 2004 Roman Martyrology.
We're striving for 100% accuracy across all three traditions. If you notice an error, please contact us at boaz@orthodoxsnake.com so we can patch it ASAP.

Works Consulted

Sources for the readings, feast data, and commemorations displayed above.

  1. Andreev, Aleksandr A. “O poryadke chteniya Evangeliya za Bozhestvennoy liturgiey v svete rekomendatsiy Pomestnogo sobora 1917–1918 gg.” Vestnik Ekaterinburgskoy dukhovnoy seminarii, no. 4(24), 2018, pp. 41–129. The rule governing how the Byzantine Gospel course's week-numbering absorbs each year's surplus or shortage (the "Lucan Jump"), used to compute the Ruthenian and Orthodox weekday/Sunday citations above. DOI: 10.24411/2224-5391-2018-10403 ↗
  2. Getcha, Archimandrite Job. The Typikon Decoded: An Explanation of Byzantine Liturgical Practice. Translated by Paul Meyendorff. St. Vladimir's Seminary Press, 2012. The book that started this project's Byzantine research: confirms the Lucan Jump date formula and the 17-week Matthean course from independent historical scholarship, documents the symmetric "Jump of the Baptism of Christ" repeat, gives the Eothinon (Resurrectional Gospel) cycle, and sets out the Degrees-of-Solemnity scale this project's own commemoration ranks are built on. svspress.com ↗
  3. Hayduk, Rev. Various Facebook comments on the mechanics of the Lucan Jump, in Byzantine Catholic discussion threads. Helped make initial sense of the Lucan Jump early in this project's research, before Getcha and Andreev's published sources were found.
  4. The Lectionary for Mass, Sunday and Weekday tables, compiled by Felix Just, S.J., Ph.D. Roman Mass citations for Ordinary Time, Lent, the Easter season, and early Advent — for 2026, Ordinary Time citations from Aug 2 onward (Weeks 18–34) come from this table's weekday-cycle data. catholic-resources.org ↗
  5. Lectionary of the Byzantine Church, Byzantine Catholic Metropolia of Pittsburgh. General plain-language background on the continuous Gospel/Epistle course and the Lucan Jump; consulted early in this project's research, superseded for the actual computation by Getcha and Andreev above. byzcath.org ↗
  6. Martyrologium Romanum (2004, editio typica altera), transcribed by Geoffrey Mondello. Source of the Roman panel's daily commemoration list; the year-round Roman Martyrology, not the smaller General Roman Calendar. bostoncatholicjournal.com ↗
  7. Menaion, per-day propers pages, Metropolitan Cantor Institute, Byzantine Catholic Archeparchy of Pittsburgh. Ruthenian fixed-feast citations and daily commemoration names. mci.archpitt.org ↗
  8. Nebesnyk, Rev. Olexiy. Personal communication. St. Anne's Byzantine Catholic Church, New Port Richey, FL. Explained how to determine the readings and hymns used on Kyriopascha (when the Annunciation coincides with Pascha), informing this project's handling of that case.
  9. Orthodox Master Menologion, Aorist Press. Cross-tradition rank data (Simple/Vigil/Great Feast, etc.) for Ruthenian and Orthodox commemorations. aoristpress.com/menologion ↗
  10. Petras, David M. (arr.). 2027 Typikon. Byzantine Seminary Press. The annual edition for ecclesiastical year September 2026–August 2027; its real, dated entries were used to confirm the Lucan Jump week-shift and other movable-cycle calculations behind the Ruthenian and Orthodox panels above.
  11. Petras, David M. (arr.). Common Typikon. Revised 2017. Byzantine Seminary Press. The Ruthenian Typikon's standardized, year-independent Formats and Commons governing precedence when a Sunday and a fixed feast concur — informs when a Great Feast suppresses the ordinary Sunday reading.
  12. Roman Lectionary/Ordo Calendars (2024–2026 editions), Roman Catholic Diocese of Saint Petersburg, FL. Roman citations for the 18 fixed-date Solemnities and Feasts; provided directly to this project by the diocese.
  13. romcal (v1.3.0), open-source liturgical calendar engine. Identifies which Roman fixed-date observances are Solemnities, Feasts, or Memorials. npmjs.com/package/romcal ↗
  14. Scripture Readings and Lives of the Saints, daily pages, Orthodox Church in America. Orthodox fixed-feast citations and daily commemoration names. oca.org/readings/daily ↗