Swedish days of the week and months

The short answer

The Swedish days of the week are måndag, tisdag, onsdag, torsdag, fredag, lördag, söndag, and the week starts on Monday. The months are januari, februari, mars, april, maj, juni, juli, augusti, september, oktober, november, december. Both are written with a small letter in Swedish, never a capital. To say "on Monday" you use på måndag, and "in January" is i januari.

That is enough to get by. The rest of this guide covers abbreviations, where the day names come from (mostly Norse gods), how Swedes write dates, week numbers, and the small prepositions that trip up almost every learner.

Days of the week

A few pronunciation points. In everyday speech the -dag ending is often shortened to -da: månda, tisda, freda. In torsdag the rs merges into a "sh" sound in most of Sweden. And the å in måndag is a long "aw"-like sound, not an English "a". The Swedish pronunciation guide explains the vowels.

Calendars, timetables and shop opening hours use the short forms: mån–fre 9–18, lör 10–15, sön stängt (Mon–Fri 9am–6pm, Sat 10am–3pm, Sun closed). In tight spaces you will also see one or two letters: M T O T F L S or må ti on to fr lö sö.

Words for days and weeks

Both spellings, i dag and idag, are correct. Ett dygn is a word English lacks: a full day and night, used for hotel stays, rentals and sleep (Jag har inte sovit på ett dygn, I haven't slept for 24 hours).

Where the Swedish day names come from

Like English, Swedish names most weekdays after the sun, the moon and Norse gods. The Germanic peoples took over the Roman seven-day week and replaced the Roman gods with their own nearest equivalents, which is why Swedish and English line up so closely (Hellquist, Svensk etymologisk ordbok).

Lördag is the odd one out. It comes from Old Swedish lögherdagher, from lög, a bath or washing. Saturday was the day people washed before Sunday. Fredag is often linked to the goddess Freja, but most etymologists connect it with Frigg; the two figures were easily confused even in the past.

Months of the year

The month names come from Latin, as in English, so they are easy to recognise. Watch the spelling: januari, februari and augusti end in -i, maj has a j, and mars has an s. Short months such as mars, maj, juni and juli are usually not abbreviated at all.

Pronunciation traps: juni and juli are easy to mix up when spoken, so listen for the n or l, and on the phone it is fine to add the number to be sure. Augusti is stressed on the second syllable: au-GUS-ti.

Seasons

I sommar means this (coming or current) summer; i somras means last summer. The same -s pattern works for the days of the week, as you will see below.

How to write dates in Swedish

Swedish puts the day before the month, and you never capitalise the month:

• In running text: 7 oktober 2026 or den 7 oktober 2026.
• In forms, letters and documents: 2026-10-07 (year, month, day). This ISO format is standard in Sweden and is what you will see on receipts, tickets and official letters.
• Informally: 7/10 (the seventh of October, not the tenth of July).

The Swedish writing rules for public authorities prefer den 7 oktober 2026 in running text, say the all-number form should not be used there, and allow 2026-10-07 in letter headings, decisions and references (Myndigheternas skrivregler, section 9.3).

Saying dates aloud

Dates are said with ordinal numbers and usually den in front:

• den sjunde oktober: the seventh of October
• den första maj: the first of May
• den tjugofjärde december: the twenty-fourth of December (Christmas Eve, the main Christmas day in Sweden)
• Vilket datum är det i dag? What's the date today?
• Det är den femte. It's the fifth.

Years are read in hundreds: 1998 is nittonhundranittioåtta, and 2026 is usually tjugohundratjugosex or tvåtusentjugosex. To practise the numbers themselves, including ordinals, use the Swedish numbers tool.

Week numbers

Swedes plan by week number much more than English speakers do. At work you will hear Vi ses vecka 42 or Leverans v. 12, and many calendars print the week number on every page. Weeks follow the ISO system: Monday is the first day, and week 1 is the week that contains the first Thursday of the year.

• Vilken vecka är det? What week is it?
• Jag har semester vecka 28 till 31. I'm on holiday weeks 28 to 31.

Prepositions: på måndag, i måndags, i januari

This is where learners make the most mistakes, because Swedish uses different small words depending on whether the time is past, future or repeated.

With days

Vi ses på fredag! (See you on Friday!)

Jag träffade henne i fredags. (I met her last Friday.)

Jag tränar på tisdagar. (I work out on Tuesdays.)

The i ...s form for the past (i måndags, i tisdags, i lördags) is very common and has no English equivalent. It is the same pattern as i somras and i vintras.

With parts of the day

I natt is ambiguous: it can mean the coming night or the night just passed, and the verb tense tells you which. Jag sov dåligt i natt (I slept badly last night); Det blir kallt i natt (It'll be cold tonight).

With months, years and weekends

Jag fyller år i april. (My birthday is in April.)

Vi flyttade hit 2019. (We moved here in 2019.)

Vad gjorde du i helgen? (What did you do at the weekend?)

Notice that a year takes no preposition at all: Jag föddes 1990, not "i 1990".

Holidays and days with names

Some days have their own names you will hear every year:

Afton means eve, and in Sweden the eves are the big days: Christmas presents are opened on julafton and the midsummer party is on midsommarafton. Dates follow Sweden's public holiday law (Lag (1989:253) om allmänna helgdagar); note that the eves themselves are not official public holidays, although most people have them off.

FAQ

Are days of the week capitalised in Swedish?

No. Days of the week and months are written with a small letter: måndag, januari. Only at the start of a sentence do they get a capital.

What does "lördag" mean?

It comes from Old Swedish lögherdagher, "washing day", from lög (a bath). It is the only Swedish weekday not named after a heavenly body or a god.

How do you say "on Monday" in Swedish?

På måndag for the coming Monday, i måndags for last Monday, and på måndagar for every Monday.

How do you write the date in Swedish?

In text, 7 oktober 2026, with the day first and the month in small letters. In forms and official documents, 2026-10-07. Spoken: den sjunde oktober.

Does the Swedish week start on Monday?

Yes. Monday is the first day of the week in Sweden, and weeks are numbered with the ISO system, which Swedes use a lot at work and school.

Sources

• Hellquist, Elof (1922). Svensk etymologisk ordbok: runeberg.org/svetym (public domain). Last checked 7 October 2026.
• Myndigheternas skrivregler, 5th edition (Ds 2001:32), section 9.3 "Datum", Swedish Government Offices: PDF at regeringen.se. Later editions are published by Språkrådet at the Institute for Language and Folklore, isof.se. Last checked 7 October 2026.
• Lag (1989:253) om allmänna helgdagar: riksdagen.se. Last checked 7 October 2026.

Keep going

Days, dates and times come up in every real conversation, and our free Season 1 course uses them from the first lessons, with real speech and synced transcripts. Start the free course. For the numbers behind the dates, try the numbers tool, and for everyday phrases, the essential phrases guide.