Breakdown of Мы организуем вечеринку, потому что десятого мая две тысячи двадцать пятого года нашему клубу будет десять лет.
мы
we
наш
our (наш, наша, наше)
потому что
because
десять
ten
год
year
две
two (f)
быть
to be
первый
first (1st)
май
May
двадцать
twenty
тысяча
thousand
пятый
fifth
десятый
tenth
вечеринка
party
клуб
club
организовать
to organize
Questions & Answers about Мы организуем вечеринку, потому что десятого мая две тысячи двадцать пятого года нашему клубу будет десять лет.
Why are the words in the date десятого мая and пятого года in the Genitive case?
In Russian, to say that something happens on a specific full date, you put the ordinal number for the day, the month, and the ordinal number for the year into the Genitive case. You don't need a preposition like "on" in English; the Genitive case endings alone carry the meaning of "on the tenth of..."
Why isn't every word in the year две тысячи двадцать пятого changed to the Genitive case?
For years in Russian, only the very last number is an ordinal number (meaning "the 25th" year). The preceding numbers (две тысячи двадцать) remain regular base numbers and don't change their endings here. Because only the last word acts as the ordinal adjective, only that last word takes the Genitive ending (пятого) to match the date structure.
Why is the club in the Dative case (нашему клубу) instead of the Nominative case?
In Russian, age is always expressed using the Dative case for the person or thing getting older. You are literally saying "to our club will be ten years." You have likely seen this with people, like in Мне двадцать лет (I am twenty years old), and it applies exactly the same way to objects, cities, or organizations.
Why do we use the word лет instead of a form of год at the end of the sentence?
The word for year (год) changes depending on the number before it. After numbers ending in 1 (except 11), you use год. After 2, 3, and 4, you use the Genitive singular года. But for quantities of 5 and up, including 10 (десять), you must use the Genitive plural, which is the completely different word лет (historically meaning "summers").
Does организуем mean "we are organizing" right now, or "we will organize"?
The verb организовать (to organize) is a special "bi-aspectual" verb. This means it can act as both an imperfective verb and a perfective verb. Depending on the context, мы организуем can mean "we are organizing" (present imperfective) or "we will organize" (future perfective). The English translation here uses the present continuous, but either interpretation makes sense for planning an upcoming event!
Learn Мы организуем вечеринку, потому что десятого мая две тысячи двадцать пятого года нашему клубу будет десять лет and more in Russian
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