alljährlich
annual / yearly
Recurring or taking place every year; yearly.
Das alljährliche Weinfest zieht Besucher aus der ganzen Region an.
The annual wine festival attracts visitors from the entire region.

annual / yearly
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annual / yearly
Recurring or taking place every year; yearly.
Das alljährliche Weinfest zieht Besucher aus der ganzen Region an.
The annual wine festival attracts visitors from the entire region.

The word is made up of 'all' and 'jährlich' (yearly). The prefix 'all-' intensifies the meaning of 'jährlich' and emphasizes that something really happens every single year without exception.
Die alljährliche Prüfung findet immer im Juni statt.
The annual exam always takes place in June.
'Alljährlich' (annual / yearly) can stand as an adjective before a noun or be used as an adverb to describe a verb. Both uses are correct and common.
Das ist unser alljährliches Familientreffen.
This is our annual family gathering.
'Alljährlich' (annual / yearly) sounds somewhat more formal and elevated than the expression 'jedes Jahr' (every year). It is therefore often used in official announcements, reports, or written language.
Die Firma veröffentlicht alljährlich ihren Geschäftsbericht.
The company publishes its annual report every year.
The word is typically used for recurring events, festivals, conferences, or traditions. Common combinations are 'alljährliches Treffen' (annual meeting), 'alljährliches Fest' (annual festival), or 'alljährlich stattfinden' (to take place annually).
Das alljährliche Stadtfest lockt viele Touristen an.
The annual city festival attracts many tourists.
regular
'regelmäßig' and 'alljährlich' both describe that something happens again. The difference lies in the interval: 'regelmäßig' can mean daily, weekly, monthly, or at other fixed intervals. 'alljährlich' always means once every year or recurring every year. Learners may confuse the words because both sound like repetition. If the exact yearly rhythm is important, 'alljährlich' is more precise. If you only mean a fixed or frequent rhythm, 'regelmäßig' is more natural.

Die Eltern besuchen alljährlich den Gesundheitskurs in ihrer Stadt.
The parents attend the health course in their city every year.
Der Kunde kommt regelmäßig nach der Arbeit in den kleinen Buchladen.
The customer regularly comes to the small bookstore after work.