Julian calendar
Calendar introduced by Julius Caesar
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We include updates on Old Style and New Style dates, Doomsday rule, Zeller's congruence, Common year starting on Friday, Common year starting on Monday, Determination of the day of the week, Common year starting on Thursday, Common year starting on Wednesday, Leap year starting on Thursday, Dominical letter, Common year starting on Sunday, Leap year starting on Friday, Common year starting on Saturday, Leap year starting on Saturday, Leap year starting on Sunday, Common year starting on Tuesday ... and more.
| March 16 2025 |
Doomsday rule
The current year for which the Doomsday rule is being demonstrated, highlighting the ongoing utility of this calendar calculation method.
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| 2024 |
Determination of the day of the week
A leap year starting on Monday, corresponding to the 1996 calendar year. The first two months correspond to the first two months of 2018, and the last ten months correspond to the last ten months of 2019.
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| September 2024 |
Byzantine calendar
Beginning of the year 7533 in the Byzantine calendar, marking the ecclesiastical new year as traditionally observed by Orthodox Christians.
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| 2023 |
Determination of the day of the week
A common year starting on Sunday, corresponding to the 2017 calendar year.
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| 2023 |
Old Calendarists
The schismatic Orthodox Church of Ukraine adopted the Revised Julian calendar, marking a significant calendrical shift for the religious organization.
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| 2022 |
Determination of the day of the week
A common year starting on Saturday, corresponding to the 2011 calendar year. The last ten months correspond to the last ten months of 2016.
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| January 1 2022 |
Common year starting on Friday
A common year starting on Friday in the obsolete Julian calendar.
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| 2021 |
Determination of the day of the week
A common year starting on Friday, corresponding to the 2010 calendar year. The first two months correspond to the first two months of 2016.
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| January 1 2021 |
Common year starting on Friday
Most recent common year starting on Friday in the Gregorian calendar begins.
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| 2020 |
Determination of the day of the week
Last occurrence of a leap year starting on Wednesday.
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| 2019 |
Byzantine calendar
Protopresbyter Doru Costache published 'The Orthodox Doctrine of Creation in the Age of Science', discussing Orthodox Christianity's approach to creation and scientific understanding.
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| 2017 |
Byzantine calendar
Alexander V. Khramov published 'Fitting Evolution into Christian Belief: An Eastern Orthodox Approach', examining the relationship between Christian faith and evolutionary theory from a Greek patristic perspective.
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| 2011 |
Byzantine calendar
The second edition of 'Genesis, Creation, and Early Man' was published, compiling Orthodox-Byzantine perspectives on biblical chronography based on Fr. Seraphim Rose's work.
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This contents of the box above is based on material from the Wikipedia articles Common year starting on Friday, Doomsday rule, Old Calendarists, Determination of the day of the week & Byzantine calendar, which are released under the Creative Commons Attribution-ShareAlike 4.0 International License.