Computation of time
For the treatise on time written by Bede the Venerable, see The Reckoning of Time.
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Catholic canon law
In the canon law of the Catholic Church, the computation of time, also translated as the reckoning of time (Latin: suppputatio temporis), is the manner by which legally-specified periods of time are calculated according to the norm of the canons on the computation of time.
Months are computed according to the calendar from the date of publication. A "canonical month" (in contradistinction to a "calendar month") is a period of 30 days, while a "calendar month" is a continuous month.
The vacatio legis is computed according to the calendar; for example, if a law is promulgated on 2 November, and the vacatio legis is 3 months, then the law takes effect on 2 February. So a universal law has a vacatio legis of approximately 90 days—3 months taken according to the calendar—while a particular law has a vacatio legis of approximately 30 days—1 month taken according to the calendar—unless specified to the contrary.
- Peters, Dr. Edward N., The 1917 or Pio-Benedictine Code of Canon Law, pg. 39 (Book I, Title III).
- Caparros et al., 1983 Code of Canon Law, pg. 160 (Book I, Title XI: De temporis supputatione)
- Della Rocca, Fernando. Manual of Canon Law, pg. 70.
- Canon 202 §1, 1983 Code of Canon Law
- De Meester, Juris Canonici Compendium, v. 1, pg. 176.
- Benedict XV, ap. const. Providentissima Mater Ecclesia
- John Paul II, ap. const. Sacræ disciplinæ leges
- Caparros, Ernest, Michel Thériault, Jean Thorn (editors). Code of Canon Law Annotated: Second edition revised and updated of the 6th Spanish language edition (Woodridge: Midwest Theological Forum, 2004).
- Della Rocca, Fernando. Manual of Canon Law (Milwaukee: The Bruce Publishing Company, 1959). Translated by the Rev. Anselm Thatcher, O.S.B.
- De Meester, A. Juris Canonici et Juris Canonico-Civilis Compendium: Nova Editio, Ad Normam Codicis Juris Canonici—Tomus Primus (Brugis: Societatis Sancti Augustini, 1921).
- Peters, Dr. Edward N. The 1917 or Pio-Benedictine Code of Canon Law: In English Translation with Extensive Scholarly Apparatus (San Francisco: Ignatius Press, 2001).