Gregorian computus
E538057
Gregorian computus is the method used in the Gregorian calendar to calculate the date of Easter each year based on a refined solar and lunar cycle.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Gregorian computus canonical | 1 |
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Easter calculation method
ⓘ
computus ⓘ |
| appliesTo |
Roman Catholic Church
NERFINISHED
ⓘ
Western Christianity NERFINISHED ⓘ most Protestant churches ⓘ |
| assumesVernalEquinoxOn | 21 March ⓘ |
| basedOn |
lunar cycle
ⓘ
solar cycle ⓘ |
| calculates | date of Easter ⓘ |
| corrects | drift of vernal equinox in Julian calendar ⓘ |
| definesEasterAs | first Sunday after the Paschal full moon ⓘ |
| definesPaschalFullMoonAs | ecclesiastical full moon on or after 21 March ⓘ |
| differsFrom |
Julian computus
ⓘ
Orthodox Easter computation ⓘ |
| domain |
Christian liturgy
ⓘ
calendar science ⓘ |
| ensures | average year length close to tropical year ⓘ |
| formalizedIn | papal bull Inter gravissimas NERFINISHED ⓘ |
| goal |
keep Easter near the astronomical full moon
ⓘ
keep Easter near the astronomical vernal equinox ⓘ |
| hasConsequence | different Easter date from Julian-based churches in many years ⓘ |
| implementedIn |
Easter tables
ⓘ
ecclesiastical tables ⓘ |
| introducedBy | Pope Gregory XIII NERFINISHED ⓘ |
| introducedInYear | 1582 ⓘ |
| introducedWith | Gregorian calendar reform NERFINISHED ⓘ |
| refines | Julian computus NERFINISHED ⓘ |
| relatedTo |
Paschal full moon
ⓘ
computus ⓘ ecclesiastical calendar ⓘ epact tables ⓘ |
| timeScale | proleptic Gregorian calendar NERFINISHED ⓘ |
| usedFor | determining movable feasts dependent on Easter ⓘ |
| usedIn | Gregorian calendar NERFINISHED ⓘ |
| uses |
Golden Number
ⓘ
Metonic cycle NERFINISHED ⓘ algorithmic rules ⓘ century-based corrections ⓘ epact ⓘ leap year rules of Gregorian calendar ⓘ lunar correction ⓘ lunar cycle corrections every 300 years ⓘ lunar cycle corrections every 400 years ⓘ solar correction ⓘ table of epacts ⓘ |
| usesCalendar | Gregorian calendar NERFINISHED ⓘ |
| usesCycleLength | 19-year Metonic cycle ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.