אנחנו מכינים עוגה מיוחדת, כדי שהיא תזכור את היום הזה הרבה זמן.

Hebrew does not have an indefinite article like a/an.

So:

• עוגה מיוחדת = a special cake
• העוגה המיוחדת = the special cake

Hebrew only marks definiteness with ה־ (the), not indefiniteness.

מכינים is the masculine plural present-tense form of להכין (to prepare / to make).

With אנחנו (we), Hebrew usually chooses:

• מכינים for a group of men or a mixed group
• מכינות for a group of only women

So אנחנו מכינים is the normal default unless the speakers are known to be all female.

In Hebrew, adjectives normally come after the noun, not before it.

So:

• עוגה מיוחדת = literally cake special
• natural English = a special cake

Also, the adjective has to agree with the noun:

• עוגה is feminine singular
• so מיוחד becomes מיוחדת

If the noun were masculine, you would use מיוחד instead.

Because adjectives in Hebrew agree with the noun in gender and number.

Here:

• עוגה = feminine singular
• therefore the adjective must also be feminine singular
• מיוחד → מיוחדת

A few matching examples:

• ספר מיוחד = a special book
• עוגה מיוחדת = a special cake
• עוגות מיוחדות = special cakes

What you are seeing is really כדי ש־היא.

Hebrew often uses:

• כדי + infinitive when the subject stays the same
  Example: אנחנו לומדים כדי להצליח = We study in order to succeed
• כדי ש־ + clause when there is a separate subject
  Example: כדי שהיא תזכור = so that she will remember

The ש־ is attached directly to the next word, so ש־ + היא becomes שהיא.

After כדי ש־ (so that / in order that), Hebrew normally uses the future tense to express purpose.

So:

• כדי שהיא תזכור = so that she will remember

Even though English sometimes uses other structures, Hebrew usually chooses the future here.

Yes. On its own, תזכור can mean either:

• she will remember
• you (singular feminine) will remember

Hebrew future-tense forms sometimes overlap like this.
In this sentence, the subject היא makes it clear that the meaning is she will remember.

את marks a definite direct object.

It does not translate into English, but it tells you that the noun following it is the direct object of the verb.

Here:

• תזכור = will remember
• את היום הזה = this day

You use את because היום הזה is definite.

Compare:

• היא תזכור יום = she will remember a day
• היא תזכור את היום הזה = she will remember this day

In Modern Hebrew, demonstratives like הזה / הזאת / האלה usually come after the noun.

So:

• היום הזה = this day
• הספר הזה = this book
• העוגה הזאת = this cake

Also notice agreement:

• יום is masculine singular → הזה
• עוגה is feminine singular → הזאת

Literally, הרבה זמן means a lot of time, but in natural English it often means a long time.

So here:

• תזכור את היום הזה הרבה זמן = she will remember this day for a long time

Hebrew often uses time expressions like this without a separate word for for.

Hebrew often expresses duration without a preposition.

So Hebrew can say:

• חיכיתי שעתיים = I waited for two hours
• גרתי שם שנים = I lived there for years
• תזכור את היום הזה הרבה זמן = she will remember this day for a long time

English usually needs for here, but Hebrew often does not.

Grammatically, היא can mean either she or it, because Hebrew nouns have grammatical gender.

What it means depends on context.

In this sentence, the intended meaning is she, referring to a female person.
If it referred to עוגה (cake), the sentence would mean something like so that the cake will remember, which obviously does not fit the situation.

Yes, often you can.

Hebrew frequently leaves out subject pronouns when the verb already makes the subject clear enough from context.

So both are possible:

• כדי שהיא תזכור את היום הזה הרבה זמן
• כדי שתזכור את היום הזה הרבה זמן

Including היא can add clarity or emphasis, especially if there could be confusion about who is supposed to remember.

They are close, but not always identical.

• מכינים = preparing / making, often with a sense of getting something ready
• עושים = doing / making, more general

With food, מכינים is very natural:

• אנחנו מכינים עוגה = We are making/preparing a cake

You might also hear עושים עוגה in casual speech, but מכינים sounds especially natural for food or preparation.

A simple pronunciation guide is:

Anáchnu mekhiním ugá meyukhédet, kedéi she-hi tizkór et hayóm hazé harbé zman.

A few notes:

• kh represents the Hebrew sound in כ/ח, like the ch in German Bach
• stress often falls near the end of the word:
  • mekhiním
  • meyukhédet
  • kedéi
  • tizkór
  • harbé

You do not need a perfect accent to be understood, but getting the stress roughly right helps a lot.