Western Easter
Sunday, April 11, 1971
Gregorian computus. Golden number 15, epact 3, Paschal full moon April 10.
Easter 1971
Easter 1971: Sunday, April 11
In 1971 Western Easter, reckoned in the Gregorian calendar, falls on Sunday, April 11, 1971. Orthodox Easter (Pascha), reckoned in the Julian calendar, falls on Sunday, April 18, 1971, one week later.
Orthodox Easter
Sunday, April 18, 1971
Julian computus: April 5 in the Julian calendar, plus 13 days to reach the Gregorian calendar.
In 1971 the two Easters are 7 days apart: Orthodox Easter is one week after Western Easter. They last fell on the same day in 1966 (April 10). They next fall on the same day in 1974 (April 14).
Western · Apr 11
Orthodox · Apr 18
MarchAprilMayThe moving feasts of 1971
Western feasts, 1971
| Feast | Date | From Easter |
|---|---|---|
| Shrove Tuesday | Tuesday, February 23, 1971 | −47 days |
| Ash Wednesday | Wednesday, February 24, 1971 | −46 days |
| Palm Sunday | Sunday, April 4, 1971 | −7 days |
| Maundy Thursday | Thursday, April 8, 1971 | −3 days |
| Good Friday | Friday, April 9, 1971 | −2 days |
| Holy Saturday | Saturday, April 10, 1971 | −1 day |
| Easter Sunday | Sunday, April 11, 1971 | Easter Sunday |
| Easter Monday | Monday, April 12, 1971 | +1 day |
| Ascension Day | Thursday, May 20, 1971 | +39 days |
| Pentecost | Sunday, May 30, 1971 | +49 days |
Orthodox feasts, 1971
| Feast | Date | From Easter |
|---|---|---|
| Clean Monday | Monday, March 1, 1971 | −48 days |
| Palm Sunday | Sunday, April 11, 1971 | −7 days |
| Great and Holy Friday | Friday, April 16, 1971 | −2 days |
| Pascha (Easter Sunday) | Sunday, April 18, 1971 | Easter Sunday |
| Ascension | Thursday, May 27, 1971 | +39 days |
| Pentecost | Sunday, June 6, 1971 | +49 days |
Each date is Easter Sunday plus or minus a fixed number of days; the offsets and their sources are on the about page. Observance varies by church and by country. Whether a feast is a day off work is a matter of each country’s law: Holidays lists each country’s public holidays, off the open Nager.Date database.
How early is Easter in 1971?
April 11 is date 21 of the 35 that Western Easter can take, March 22 to April 25: 20 days after the earliest possible date and 14 days before the latest. Of the 201 Easters from 1900 to 2100, 109 fall on an earlier date than this one and 84 fall on a later date. 7 other years in that span share the date: 1909, 1982, 1993, 2004, 2066, 2077, 2088. Before 1971, Western Easter last fell on April 11 in 1909; after 1971 it next does in 1982.
In the 1970s Western Easter ran from March 26 (1978) to April 22 (1973); 1971’s April 11 is the sixth-earliest of the ten. Across the twentieth century (1901–2000) Western Easter falls on April 11 in 4 years, and the Western and Orthodox Easters share a Sunday in 26 years.
Orthodox Easter on April 18 is April 5 in the Julian calendar; 13 days carry it to the Gregorian calendar in 1971. From 1900 to 2100 Orthodox Easter falls on an earlier Gregorian date in 75 years and on a later one in 119 years; it falls on the same date in 1982, 1993, 2055, 2066, 2077, 2088.
The earliest and latest Easters from 1900 to 2100, with how often each date occurs, are on their own page.
The arithmetic for 1971
15Golden number: the year’s place in the 19-year cycle of the moon, (1971 mod 19) + 1.
3Gregorian epact: the age of the reckoned moon at the start of the year.
April 10Paschal full moon of the Gregorian reckoning, a Saturday. Easter is the Sunday after it.
April 14Paschal full moon of the Julian reckoning in Gregorian dates (Julian April 1), a Wednesday.
The two algorithms, worked for 1971
- Western: the Anonymous Gregorian algorithm
a=14 b=19 c=71 d=4 e=3 f=1 g=6 h=20 i=17 k=3 l=0 m=0h + l − 7m + 114 = 134, and 134 ÷ 31 = 4 remainder 10: month 4, day 10 + 1. April 11- Orthodox: Meeus’s Julian algorithm
a=3 b=4 c=14 d=11 e=3d + e + 114 = 128, and 128 ÷ 31 = 4 remainder 4: Julian April 5. Plus 13 days: April 18
How the date of Easter is calculated explains each letter. The dates on this page agree with the US Census Bureau table (Western), the 5ko.free.fr tables (Western and Orthodox), each read September 28, 2026.