Even though we celebrate Good Friday and Easter Sunday, there is no mention of days such as "Sunday" or "Wednesday" in the Bible.

Why are days not mentioned in the Bible?


The ancient Hebrew people simply numbered the days of the week except for Saturday which was known as the Sabbath.

In Hebrew, the days of the week are simply numbered, except for the 7th, which is the Sabbath (Shabbat, שַׁבָּת‎‎ ). - The Days of the Week

As for the Greco-Roman tradition:

Between the 1st and 3rd centuries the Roman Empire gradually replaced the eight-day Roman nundinal cycle with the seven-day week. Our earliest evidence for this new system is a Pompeiian graffito referring to the 6th February (viii idus Februarius) of the year AD 60 as dies solis ("Sunday") - Names of the days of the week

It could be noted that some Liturgical books in the Catholic Church still use a numbered system for the days of the week.

In the Judeo-Christian or Abrahamic tradition, the first day of the week is Sunday. Biblical Sabbath (corresponding to Saturday), when God rested from six-day Creation, made the day following Sabbath the first day of the week (corresponding to Sunday). Seventh-day Sabbaths were sanctified for celebration and rest. After the week was adopted in early Christianity, Sunday remained the first day of the week, but also gradually displaced Saturday as the day of celebration and rest, being considered the Lord's Day.

Saint Martin of Dumio (c. 520–580), Archbishop of Braga, decided not to call days by pagan gods and to use ecclesiastic terminology to designate them. While the custom of numbering the days of the week was mostly prevalent in the Eastern Church, Portuguese and Galician, due to Martin's influence, are the only Romance languages in which the names of the days come from numbers rather than planetary names. - Days numbered from Sunday (Wikipedia).

As for the Roman Rite itself:

In the Roman Rite liturgy, the term feria is used in Latin to denote days of the week other than Sunday and Saturday. Some use the term even in English, but the official translation of the Roman Missal uses "weekday" instead. Various reasons are given for the Latin terminology. The sixth lesson for December 31 in the pre-1969 Roman Breviary says that Pope Sylvester I ordered the continuance of the already existing custom "that the clergy, daily abstaining from earthly cares, would be free to serve God alone". Others believe that the Church simply Christianized a Jewish practice. The Jews frequently counted the days from their Sabbath, and so we find in the Gospels such expressions as una Sabbati and prima Sabbati, the first from the Sabbath. (Wikipedia).

  • "the 6th February (viii idus Februarius) of the year AD 60 as dies solis ("Sunday")" --> this Date Calculator indicates Feb 6th, AD 60 as Wednesday. Hmmmm – chux - Reinstate Monica Dec 4 '16 at 17:53
  • @chux: the AD system was introduced in AD 525 ( en.wikipedia.org/wiki/Anno_Domini ), so the graffito probably didn't include an AD year. – RemcoGerlich Dec 5 '16 at 8:20
  • @RemcoGerlich The AD 60 comes from the interpretation of the graffiti. "Nerone Caesare Augusto Cosso Lentuol Cossil fil. Cos. VIII idus Febr(u)arius dies solis, luna XIIIIX nun(dinae) Cumis, V (idus Februarias) nun(dinae) Pompeis.". Still, some inconstancy exist between that and the referenced calculator – chux - Reinstate Monica Dec 5 '16 at 16:14
  • I was given the explanation that terms like "Sunday" and " Monday" were not used in Bible since they indirectly refer to pagan Gods. – venkatesan Dec 9 '16 at 18:56
  • @venkatesan The actual terms Monday , Tuesday and so on did not come into existence until centuries after the birth of Christ and thus were not employed as such in Sacred Scripture, regardless of their pagan origins.... – Ken Graham Dec 9 '16 at 19:48

Because the words "Sunday", "Monday, "Tuesday, &c., are names assigned to the days of the week in English, and came into use hundreds of years after the books of the Bible were written in Greek or Hebrew.

Further, it may be that the custom in Hebrew, and perhaps in Greek, was to refer to days not by name, but by position, as in the Easter story, "Early in the morning on the first day of the week ...", where today English speaking Christians might be inclined to say instead, "Early on Sunday morning ...".

  • As additional info to the above answer: To name the days of the week by their number is still customary in some countries with Christian cultural heritage. For example in Portugal. – Milka's Wrangler Dec 11 '16 at 21:06
  • It's probably worth also mentioning that they are named after pagan gods - Moon, Tiw, Wotan, Thor... . Not the sort of names the Hebrews were likely to use. – DJClayworth May 5 '20 at 0:45

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