من معمولا قرارها را در تقویم مینویسم تا یادم باشد.

Yes. In Persian, می‌نویسم already means I write / I usually write, so من is often optional.

• می‌نویسم = I write
• من می‌نویسم = I write / I am the one who writes

Here, من adds a little emphasis or clarity, but the sentence would still be perfectly natural without it:

• معمولاً قرارها را در تقویم می‌نویسم تا یادم باشد.

معمولاً means usually.

In Persian, adverbs like معمولاً often come before the main object and verb, though their position can be somewhat flexible. In this sentence, it naturally comes early:

• من معمولاً قرارها را در تقویم می‌نویسم

This is similar to English I usually write appointments in my calendar.

قرارها is the plural of قرار.

Depending on context, قرار can mean things like:

• appointment
• meeting
• arrangement
• plan

So قرارها here means something like:

• appointments
• plans
• scheduled engagements

In this sentence, appointments or plans is probably the most natural translation.

ـها is a very common Persian plural marker.

• قرار = appointment / plan
• قرارها = appointments / plans

It is one of the main ways to make nouns plural in Persian.

را marks a specific direct object.

So in:

• قرارها را

the speaker is talking about specific appointments/plans, not appointments in general.

A useful way to think about it is:

• قرارها = appointments
• قرارها را = the appointments / those appointments, as the object of the verb

Since the speaker is writing down particular appointments in the calendar, را is natural here.

در means in, and تقویم means calendar.

So:

• در تقویم = in the calendar

Persian does not use articles like a or the in the same way English does, so تقویم can mean:

• a calendar
• the calendar
• my calendar

The exact meaning comes from context. In this sentence, English would usually say in my calendar or in the calendar.

Yes. تو تقویم is very common in everyday spoken Persian.

• در تقویم = a bit more neutral/formal/written
• تو تقویم = more conversational

Both mean in the calendar.

So these are both natural:

• قرارها را در تقویم می‌نویسم
• قرارها را تو تقویم می‌نویسم

می‌نویسم is the present habitual form, meaning:

• I write
• I usually write
• I do write

It is built from:

• می‌ = marks ongoing/habitual present
• نویس = present stem of نوشتن (to write)
• ـم = I

So:

• می‌نویسم = I write / I usually write

By contrast:

• نوشتم = I wrote (past)
• نویسم by itself is not the normal form here

Because the sentence talks about a usual habit, می‌نویسم is the correct choice.

The standard spelling is می‌نویسم with a zero-width non-joiner between می and the verb.

So the standard written form is:

• می‌نویسم

But in informal typing, people often write:

• مینویسم

They mean the same thing. The version with می‌ is just more correct orthographically.

Here تا means so that or in order that.

It connects the main action with its purpose:

• قرارها را در تقویم می‌نویسم = I write the appointments in the calendar
• تا یادم باشد = so that I remember / so that it stays in my memory

So the whole idea is:

• I write appointments in the calendar so that I remember.

Literally, یادم باشد is something like:

• it be in my memory
• it stay in my mind

Breakdown:

• یاد = memory / remembrance
• ـم = my
• باشد = be

So یادم باشد is an idiomatic Persian way to say:

• I remember
• it stays in my mind
• I don’t forget

This is a very common Persian expression.

Because after تا in a purpose clause, Persian often uses a subjunctive-like form such as باشد.

Compare the feeling of the two:

• یادم است = I remember / it is in my memory
• یادم باشد = so that I remember / so that it will be in my memory

In this sentence, the speaker is talking about the purpose of writing things down, so باشد is the right form.

Persian is typically an SOV language: subject–object–verb.

So the basic order is often:

• subject
• object
• verb

In this sentence:

• من = subject
• قرارها را = object
• می‌نویسم = verb

And then the purpose clause also ends with a verb:

• تا یادم باشد

This is normal Persian word order, even though it feels different from English.

It can suggest both.

Literally it is closer to:

• so that I remember

But in natural English, depending on context, people often translate the whole sentence as:

• I usually write my appointments in my calendar so I don’t forget.

That is because the practical meaning of یادم باشد here is often not forgetting.

Yes, some speakers might also say:

• تا یادم بماند

This means more literally:

• so that it stays in my memory

Both are understandable and natural, but they have slightly different nuances:

• یادم باشد = so that I remember
• یادم بماند = so that it remains in my memory

The version in your sentence is completely fine and common.

Yes. قرار is a flexible word, and context matters a lot.

It can refer to:

• a meeting
• an appointment
• a date
• an arrangement

In this sentence, because the speaker writes them in a calendar, the most natural understanding is something like:

• appointments
• planned meetings
• scheduled plans

So you choose the English wording based on context rather than forcing one fixed meaning every time.