Western Easter
Sunday, April 4, 1999
Gregorian computus. Golden number 5, epact 13, Paschal full moon March 31.
Easter 1999
Easter 1999: Sunday, April 4
In 1999 Western Easter, reckoned in the Gregorian calendar, falls on Sunday, April 4, 1999. Orthodox Easter (Pascha), reckoned in the Julian calendar, falls on Sunday, April 11, 1999, one week later.
Orthodox Easter
Sunday, April 11, 1999
Julian computus: March 29 in the Julian calendar, plus 13 days to reach the Gregorian calendar.
In 1999 the two Easters are 7 days apart: Orthodox Easter is one week after Western Easter. They last fell on the same day in 1990 (April 15). They next fall on the same day in 2001 (April 15).
Western · Apr 4
Orthodox · Apr 11
MarchAprilMayThe moving feasts of 1999
Western feasts, 1999
| Feast | Date | From Easter |
|---|---|---|
| Shrove Tuesday | Tuesday, February 16, 1999 | −47 days |
| Ash Wednesday | Wednesday, February 17, 1999 | −46 days |
| Palm Sunday | Sunday, March 28, 1999 | −7 days |
| Maundy Thursday | Thursday, April 1, 1999 | −3 days |
| Good Friday | Friday, April 2, 1999 | −2 days |
| Holy Saturday | Saturday, April 3, 1999 | −1 day |
| Easter Sunday | Sunday, April 4, 1999 | Easter Sunday |
| Easter Monday | Monday, April 5, 1999 | +1 day |
| Ascension Day | Thursday, May 13, 1999 | +39 days |
| Pentecost | Sunday, May 23, 1999 | +49 days |
Orthodox feasts, 1999
| Feast | Date | From Easter |
|---|---|---|
| Clean Monday | Monday, February 22, 1999 | −48 days |
| Palm Sunday | Sunday, April 4, 1999 | −7 days |
| Great and Holy Friday | Friday, April 9, 1999 | −2 days |
| Pascha (Easter Sunday) | Sunday, April 11, 1999 | Easter Sunday |
| Ascension | Thursday, May 20, 1999 | +39 days |
| Pentecost | Sunday, May 30, 1999 | +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.
How early is Easter in 1999?
April 4 is date 14 of the 35 that Western Easter can take, March 22 to April 25: 13 days after the earliest possible date and 21 days before the latest. Of the 201 Easters from 1900 to 2100, 63 fall on an earlier date than this one and 130 fall on a later date. 7 other years in that span share the date: 1915, 1920, 1926, 2010, 2021, 2083, 2094. Before 1999, Western Easter last fell on April 4 in 1926; after 1999 it next does in 2010.
Orthodox Easter on April 11 is March 29 in the Julian calendar; 13 days carry it to the Gregorian calendar in 1999. From 1900 to 2100 Orthodox Easter falls on an earlier Gregorian date in 31 years and on a later one in 164 years; it falls on the same date in 1909, 1920, 2004, 2083, 2094.
The earliest and latest Easters from 1900 to 2100, with how often each date occurs, are on their own page.
The arithmetic for 1999
5Golden number: the year’s place in the 19-year cycle of the moon, (1999 mod 19) + 1.
13Gregorian epact: the age of the reckoned moon at the start of the year.
March 31Paschal full moon of the Gregorian reckoning, a Wednesday. Easter is the Sunday after it.
April 4Paschal full moon of the Julian reckoning in Gregorian dates (Julian March 22), a Sunday.
The two algorithms, worked for 1999
- Western: the Anonymous Gregorian algorithm
a=4 b=19 c=99 d=4 e=3 f=1 g=6 h=10 i=24 k=3 l=3 m=0h + l − 7m + 114 = 127, and 127 ÷ 31 = 4 remainder 3: month 4, day 3 + 1. April 4- Orthodox: Meeus’s Julian algorithm
a=3 b=4 c=4 d=1 e=6d + e + 114 = 121, and 121 ÷ 31 = 3 remainder 28: Julian March 29. Plus 13 days: April 11
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.