Questions & Answers about Спасибо за тёплое пожелание.
In Russian, спасибо за... means thank you for....
So the pattern is:
- Спасибо = thanks / thank you
- за = for
- тёплое пожелание = warm wish
This is a very common structure:
- Спасибо за помощь = Thank you for the help
- Спасибо за подарок = Thank you for the gift
- Спасибо за добрые слова = Thank you for the kind words
So за is simply the standard preposition used after спасибо when you say what you are thanking someone for.
It is in the accusative case because the preposition за normally takes the accusative when it means for in this kind of expression.
So:
- за + accusative
However, here the noun is neuter singular inanimate, and for nouns like that, the accusative looks exactly like the nominative.
That is why you see:
- nominative: тёплое пожелание
- accusative: тёплое пожелание
Even though the form does not change, the case is still accusative because the grammar of за requires it.