Western Easter
Sunday, April 10, 1977
Gregorian computus. Golden number 2, epact 10, Paschal full moon April 3.
Easter 1977
Easter 1977: Sunday, April 10
In 1977 Easter falls on Sunday, April 10, 1977 for Western and Orthodox churches alike: the Gregorian and the Julian reckoning arrive at the same Sunday.
Orthodox Easter
Sunday, April 10, 1977
Julian computus: March 28 in the Julian calendar, plus 13 days to reach the Gregorian calendar.
Both Easters fall on April 10 in 1977. They last fell on the same day in 1974 (April 14). They next fall on the same day in 1980 (April 6).
Western · Apr 10
Orthodox · Apr 10
MarchAprilMayThe moving feasts of 1977
Western feasts, 1977
| Feast | Date | From Easter |
|---|---|---|
| Shrove Tuesday | Tuesday, February 22, 1977 | −47 days |
| Ash Wednesday | Wednesday, February 23, 1977 | −46 days |
| Palm Sunday | Sunday, April 3, 1977 | −7 days |
| Maundy Thursday | Thursday, April 7, 1977 | −3 days |
| Good Friday | Friday, April 8, 1977 | −2 days |
| Holy Saturday | Saturday, April 9, 1977 | −1 day |
| Easter Sunday | Sunday, April 10, 1977 | Easter Sunday |
| Easter Monday | Monday, April 11, 1977 | +1 day |
| Ascension Day | Thursday, May 19, 1977 | +39 days |
| Pentecost | Sunday, May 29, 1977 | +49 days |
Orthodox feasts, 1977
| Feast | Date | From Easter |
|---|---|---|
| Clean Monday | Monday, February 21, 1977 | −48 days |
| Palm Sunday | Sunday, April 3, 1977 | −7 days |
| Great and Holy Friday | Friday, April 8, 1977 | −2 days |
| Pascha (Easter Sunday) | Sunday, April 10, 1977 | Easter Sunday |
| Ascension | Thursday, May 19, 1977 | +39 days |
| Pentecost | Sunday, May 29, 1977 | +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 1977?
April 10 is date 20 of the 35 that Western Easter can take, March 22 to April 25: 19 days after the earliest possible date and 15 days before the latest. Of the 201 Easters from 1900 to 2100, 102 fall on an earlier date than this one and 92 fall on a later date. 6 other years in that span share the date: 1955, 1966, 2039, 2050, 2061, 2072. Before 1977, Western Easter last fell on April 10 in 1966; after 1977 it next does in 2039.
In the 1970s Western Easter ran from March 26 (1978) to April 22 (1973); 1977’s April 10 is the fifth-earliest of the ten. Across the twentieth century (1901–2000) Western Easter falls on April 10 in 3 years, and the Western and Orthodox Easters share a Sunday in 26 years.
Orthodox Easter on April 10 is March 28 in the Julian calendar; 13 days carry it to the Gregorian calendar in 1977. From 1900 to 2100 Orthodox Easter falls on an earlier Gregorian date in 24 years and on a later one in 170 years; it falls on the same date in 1904, 1966, 1988, 2061, 2067, 2072.
The earliest and latest Easters from 1900 to 2100, with how often each date occurs, are on their own page.
The arithmetic for 1977
2Golden number: the year’s place in the 19-year cycle of the moon, (1977 mod 19) + 1.
10Gregorian epact: the age of the reckoned moon at the start of the year.
April 3Paschal full moon of the Gregorian reckoning, a Sunday. Easter is the Sunday after it.
April 7Paschal full moon of the Julian reckoning in Gregorian dates (Julian March 25), a Thursday.
The two algorithms, worked for 1977
- Western: the Anonymous Gregorian algorithm
a=1 b=19 c=77 d=4 e=3 f=1 g=6 h=13 i=19 k=1 l=6 m=0h + l − 7m + 114 = 133, and 133 ÷ 31 = 4 remainder 9: month 4, day 9 + 1. April 10- Orthodox: Meeus’s Julian algorithm
a=1 b=3 c=1 d=4 e=2d + e + 114 = 120, and 120 ÷ 31 = 3 remainder 27: Julian March 28. Plus 13 days: April 10
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.