Clock and calendar: bostetan, otsailean

The hour Basque puts into the locative case together with the number: root + -tan merge into one word — bostetan — at five (o'clock), zortzietan — at eight: Lana bostetan amaitzen da — the work ends at five. The answer to "zer ordu da?" comes in the plural: bostak dira — it is five o'clock. For example: “Denda bostetan ixten da” — The shop closes at five. A rule from the Basque course: worked out on examples, not…

Updated September 1, 2026 · Lingofly

How it works

The hour Basque puts into the locative case together with the number: root + -tan merge into one word — bostetan — at five (o'clock), zortzietan — at eight: Lana bostetan amaitzen da — the work ends at five. The answer to "zer ordu da?" comes in the plural: bostak dira — it is five o'clock.

The month takes -an without contraction: otsailean — in February, abuztuan — in August, urtarrilean — in January (wave 1). The same suffix serves the days: astelehenetan — on Mondays. The year — urtean — in the year.

Table

Clock and calendar: bostetan, otsailean
with whatthe formthe example
the hournumber + -tanbostetan, zortzietan
the monthmonth + -anotsailean, abuztuan
what time is it?Zer ordu da?bostak dira

By example

  • Denda bostetan ixten da
    The shop closes at five
  • Otsailean elurra izaten da
    In February there is snow
  • Astelehenetan zazpietan esnatzen naiz
    On Mondays I wake up at seven

How the rule settles in your head

A rule is not memorized from an explanation. It is memorized from an attempt to use it and a mistake — that is why the app delivers it mixed in with words, not as a separate lesson: it resurfaces exactly where you forgot it.

Frequently asked

Clock and calendar: how does it work in Basque?

The hour Basque puts into the locative case together with the number: root + -tan merge into one word — bostetan — at five (o'clock), zortzietan — at eight: Lana bostetan amaitzen da — the work ends at five. The answer to "zer ordu da?" comes in the plural: bostak dira — it is five o'clock.

What does it look like in an example sentence Basque?

“Denda bostetan ixten da” — The shop closes at five. A rule is easier to test on sentences like this than to memorize as a wording: what surfaces in conversation is the sentence.

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Test the rule on examplesPractice