The word “Easter” is used only in English for the Christian commemoration of the death and resurrection of Christ. In most languages the word is passover (pasch), or some version of it. This is indeed what Easter is, the Christian version of passover. That’s why it moves: Jesus was Jewish, and lived in Judaea, and the events of his life are based around the Jewish lunar calendar, which gives passover as the full moon after the equinox. Jesus died on passover and rose on the Sunday after, so Easter is in principle the Sunday after passover. The Julian calendar was not in use in Judaea, unfortunately. None of this is known to the general public, and in the anglophone world it is widely assumed that every language calls it Easter.
Where does the English word “Easter” come from? Our information on this comes from a single source, Bede De ratione temporum, (CPL 2320) on the reckoning of time, dated 723 AD. Chapter 15 of this contains a list of the Anglosaxon months, which is full of interest and reads as follows:
Antiqui autem Anglorum populi (neque enim mibi congruum videtur, aliarum gentium annalem observantiam dicere, ct mese reticere) juxta cursum lunae suos menses computavere; unde et a luna Hebraeorum et Graecorum more nomen accipiunt. Si quidem apud eos luna mona, mensis monath appellatur. Primusque eorum mensis, quem Latini Januarium vocant, dicitur Giuli. Deinde Februarius Solmonath, Martius Hredmonath, Aprilis Eosturmonath, Maius Thrimylchi, Junius Lida, Julius similiter Lida, Augustus Weodmonath, September Halegmonath, October Winterfylleth, November Blodmonath, December Giuli, eodem quo Januarius nomine, vocatur. Incipiebant autem annum ab octavo Calendarum Januariarum die, ubi nunc natale Domini celebramus. Et ipsam noctem nunc nobis sacrosanctam, tunc gentili vocabulo Modranicht, id est, matrum noctem, appellabant, ob causam; ut suspicamur, ceremoniarum quas in ea pervigiles agebant. Et quotiescunque communis esset annus, ternos menses lunares singulis anni temporibus dabant. Cum vero embolismus, hoc est, XIII mensium lunarium annus occurreret, superfluum mensem aestati apponebant, ita ut tunc tres menses simul Lida nomine vocarentur, et ob id annus ille Thrilidi cognominabatur, habens IV menses gestatis, ternos ut semper temporum caeterorum. Item principaliter annum totum in duo tempora, hyemis, videlicet, et aestatis dispartiebant, sex illos menses quibus longiores noctibus dies sunt aestati tribuendo, sex reliquos hyemi. Unde et mensem quo hyemalia tempora incipiebant Winterfylleth appellabant, composito nomine ab hyeme et plenilunio, quia videlicet a plenilunio ejusdem mensis hyems sortiretur initium. Nec ab re est si et caetera mensium eorum quid significent nomina interpretari curemus. Menses Giuli a conversione solis in auctum dici, quia unus eorum praecedit, alius subsequitur, nomina accipiunt. Solmonath dici potest mensis placentarum, quas in eo diis suis offerebant; Hredmonath a dea illorum Hreda, cui in illo sacrificabant, nominatur; Eosturmonath, qui nunc paschalis mensis interpretatur, quondam a dea illorum quae Eostre vocabatur, et cui in illo festa celebrabant, nomen habuit, a cujus nomine nunc paschale tempus cognominant, consueto antiquae observationis vocabulo gaudia novae solemnitalis vocantes. Trimilchi dicebatur, quod tribus vicibus in eo per diem pecora mulgebantur. Talis enim erat quondam ubertas Britanniae, vel Germaniae, de qua in Britanniam natio intravit Anglorum. Lida dicitur blandus, sive navigabilis, quod in utroque mense et blanda sit serenitas aurarum, et navigari soleant aequora. Weodmonath mensis zizaniorum , quod ea tempestate maxime abundent. Halegmonath mensis Sacrorum. Winterfylleth potest dici composito novo nomine hyeme-plenilunium. Blotmonath mensis immolationum, quia in ea pecora quae occisuri erant diis suis voverent. Gratias tibi, bone Jesu, qui hos, ab his vanis avertens, tibi sacrificia laudis offerre donasti.
We are fortunate to have an excellent English translation of this long volume (1988, p.53-4) by Faith Wallis in the Liverpool University Press series “Translated Texts for Historians.” Here is the corresponding passage.
In olden time the English people – for it did not seem ¢tting to me that I should speak of other nations’ observance of the year and yet be silent about my own nation’s – calculated their months according to the course of the Moon. Hence, after the manner of the Greeks and the Romans, [the months] take their name from the Moon, for the Moon is called “mona” and the month “monath”.
The first month, which the Latins call January, is “Giuli”; February is called “Solmonath”; March “Hrethmonath”; April, “Eosturmonath”; May, “Thrimilchi”; June, “Litha”; July, also “Litha”; August, “Weodmonath”; September, “Halegmonath”; October, “Winterfilleth”; November, “Blodmonath”; December, “Giuli”, the same name by which January is called. They began the year on the 8th kalends of January [25 December], when we celebrate the birth of the Lord. That very night, which we hold so sacred, they used to call by the heathen word “Modranecht”, that is, ‘‘mother’s night’’, because (we suspect) of the ceremonies they enacted all that night.
Whenever it was a common year, they gave three lunar months to each season. When an embolismic year occurred (that is, one of 13 lunar months) they assigned the extra month to summer, so that three months together bore the name ‘‘Litha’’; hence they called [the embolismic] year ‘‘Thrilithi’’. It had four summer months, with the usual three for the other seasons. But originally, they divided the year as a whole into two seasons, summer and winter, assigning the six months in which the days are longer than the nights to summer, and the other six to winter. Hence they called the month in which the winter season began ‘‘Winterfilleth’’, a name made up from ‘‘winter’’ and ‘‘full Moon’’, because winter began on the full Moon of that month.
Nor is it irrelevant if we take the trouble to translate the names of the other months. The months of Giuli derive their name from the day when the Sun turns back [and begins] to increase, because one of [these months] precedes [this day] and the other follows. Solmonath can be called ‘‘month of cakes’’, which they offered to their gods in that month. Hrethmonath is named for their goddess Hretha, to whom they sacrificed at this time. Eosturmonath has a name which is now translated ‘‘Paschal month’’, and which was once called after a goddess of theirs named Eostre, in whose honour feasts were celebrated in that month. Now they designate that Paschal season by her name, calling the joys of the new rite by the time-honoured name of the old observance. Thrimilchi was so called because in that month the cattle were milked three times a day; such, at one time, was the fertility of Britain or Germany, from whence the English nation came to Britain. Litha means ‘‘gentle’’ or ‘‘navigable’’, because in both these months the calm breezes are gentle, and they were wont to sail upon the smooth sea. Weodmonath means ‘‘month of tares’’, for they are very plentiful then. Halegmonath means ‘‘month of sacred rites’’. Winterfilleth can be called by the invented composite name ‘‘winter-full’’. Blodmonath is ‘‘month of immolations’’, for then the cattle which were to be slaughtered were consecrated to their gods. Good Jesu, thanks be to thee, who hast turned us away from these vanities and given us [grace] to offer to thee the sacrifice of praise.
Interesting stuff, but clearly belonging to a time past even in Bede’s day.
All the same there appears to be an error in the Eosturmonath translation, where the translator has split the sentence in two and in the process introduced a confusion.
Eosturmonath, qui nunc paschalis mensis interpretatur, quondam a dea illorum quae Eostre vocabatur, et cui in illo festa celebrabant, nomen habuit, a cujus nomine nunc paschale tempus cognominant, consueto antiquae observationis vocabulo gaudia novae solemnitalis vocantes.
Eosturmonath has a name which is now translated ‘‘Paschal month’’, and which was once called after a goddess of theirs named Eostre, in whose honour feasts were celebrated in that month. Now they designate that Paschal season by her name, calling the joys of the new rite by the time-honoured name of the old observance.
Parsing this word by word:
et cui in illo festa celebrabant – and for whom, in that (month), feasts they used to celebrate.
nomen habuit, a cujus nomine nunc paschale tempus cognominant – (Eosturmonath) has a name, by which name now the paschal season they designate
consueto antiquae observationis vocabulo, gaudia novae solemnitalis vocantes – of the accustomed ancient observance by the name, the joys of the new rite calling
The translator has treated “cuius”, “of whom/which” as referring back to “dea … Eostre”. Well it could. “cuius” could refer to either a feminine or a neuter noun. But the curious position of the “nomen habuit” – “it has a name” – seems designed solely to avoid this. The whole bit about Eostre is put between “Eosturmonath” and “nomen habuit”, precisely to keep it out of the way of the rest of the sentence. So I suggest that “cuius” should be understood to refer to “nomen”, i.e. to the season, not the goddess.
This would mean that the TTH should read “now they designate the paschal season by its name”.
This means that – unsurprisingly – the word “Easter” comes from “Eosturmonath”, not directly from “Eostre”. According to Bede, the name Eostre gave rise to the season Eosturmonth (April) which in turn was used by the Christian English to mean the Christian festival of pasch.
So “Easter” is merely a worn down form of “Eosturmonath”.