Taloyhtiö lähettää muistutusviestin kaksi päivää ennen vesikatkoa.

Taloyhtiö is a very common Finnish term for the legal “housing company” that owns/manages an apartment building (especially in apartment blocks). In practice, it’s the body that handles building maintenance and shared decisions—similar to an HOA / condo association / building management entity, depending on the country.

It’s the subject of the sentence, so it’s in the nominative case (the dictionary form): Taloyhtiö lähettää… = “The housing company sends…”

The dictionary form is lähettää = “to send.”
Here it’s conjugated for 3rd person singular present:

• (hän/se) lähettää = “(he/she/it) sends”
  So Taloyhtiö lähettää = “The housing company sends.”

It’s the object of the verb lähettää. In Finnish, a “complete/whole” object is a total object, and in the singular it often looks like the genitive (-n):

• lähettää muistutusviestin = “send the/a reminder message” (as a complete action)

If you used the partitive (muistutusviestiä), it would suggest something less complete/ongoing/partial (depending on context), like “sending some reminder message / sending reminder messages (in an indefinite sense).”

Finnish has no articles (a/the), so muistutusviestin can be translated either way. The context decides whether it’s “a” or “the.”

It’s a compound:

• muistutus = “reminder”
• viesti = “message” So muistutusviesti = “reminder message,” and muistutusviestin is its object form here.

Finnish forms compounds very freely, so long words are common.

After numbers 2 and higher, Finnish typically uses the partitive singular:

• kaksi päivää = “two days”
• kolme viikkoa = “three weeks”
• viisi tuntia = “five hours”

So päivää is partitive singular of päivä.

Here it means “two days before” the event mentioned after ennen:

• kaksi päivää ennen vesikatkoa = “two days before the water outage/cut”

Ennen requires the partitive case for its complement:

• ennen + partitive
  So vesikatko → vesikatkoa (partitive singular).

This is just a fixed grammar pattern you learn with ennen.

It’s another compound:

• vesi = “water”
• katko = “cut/outage/interruption” So vesikatko = “water outage / water cut / interruption of water supply.”

The neutral order is what you see: Subject – Verb – Object – Time phrase:

• Taloyhtiö lähettää muistutusviestin kaksi päivää ennen vesikatkoa.

You can move parts for emphasis, for example:

• Kaksi päivää ennen vesikatkoa taloyhtiö lähettää muistutusviestin.
  This foregrounds the timing (“Two days before…, the housing company sends…”).

A few common pronunciation points:

• Taloyhtiö: the y is like French u / German ü (not English “y”).
• Double letters are held longer: lähettää has tt, so it’s a longer t sound.
• Stress is usually on the first syllable: TA-lo-yh-ti-ö, LÄ-he-ttää, MUIS-tu-tus-…, VE-si-kat-ko-a.