
ganzjährig
year-round
Lasting, available, or valid throughout the entire year.
Dieses Hotel hat einen ganzjährig geöffneten Außenpool.
This hotel has a year-round outdoor pool.
year-round
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year-round
Lasting, available, or valid throughout the entire year.
Dieses Hotel hat einen ganzjährig geöffneten Außenpool.
This hotel has a year-round outdoor pool.
The word is made up of 'ganz' (whole), 'Jahr' (year), and the adjective ending '-ig'. So it literally means 'relating to the whole year'.
Die Insel bietet ganzjährige Reisemöglichkeiten.
The island offers year-round travel opportunities.
'Ganzjährig' (year-round) can stand before a noun as an adjective or function as an adverb that refers to the verb. As an adverb, it remains unchanged and is not declined.
Das ist ein ganzjährig bewohnbares Ferienhaus.
That is a vacation home that can be lived in year-round.
This word is used very frequently in tourism, hospitality, and commerce. It often describes the availability of places, products, or services.
Der Campingplatz ist von April bis Oktober geöffnet, also nicht ganzjährig.
The campsite is open from April to October, so not year-round.
annual / yearly
„Jährlich“ means that something takes place once every year. „Ganzjährig“, by contrast, means that something is available or continues throughout the entire year. „Jährlich“ is used for a recurring event, while „ganzjährig“ is used for availability without seasonal interruption.

Das Hallenbad ist ganzjährig für Besucher geöffnet.
The indoor pool is open to visitors year-round.
Das Freibad veranstaltet jährlich einen Schwimmwettbewerb.
The outdoor pool holds a swimming competition every year.