kaigi no zikan wo wasurenai you ni, tetyou ni husen wo harimasu

It is the pattern:

dictionary/plain negative form + ように

So:

• 忘れない = not forget
• ように = so that / in order to

Together, 忘れないように means so that I don’t forget or in order not to forget.

This pattern is very common when the speaker is trying to make a certain result happen, especially when it is not just a simple intentional action like eating or going, but more about making sure something does or does not happen.

Because the purpose is to avoid forgetting.

• 忘れる = to forget
• 忘れない = not forget

So the sentence is saying the speaker puts a sticky note in their planner so they won’t forget the meeting time.

In English, we might also say so I remember the meeting time, but Japanese often expresses this idea as not forgetting rather than remembering.

Both ように and ために can express purpose, but they are not always interchangeable.

In this sentence, 忘れないように sounds natural because it focuses on making sure a certain state happens: not forgetting.

A useful rule of thumb is:

• ために is often used with deliberate, controllable actions
• ように is often used for results, ability, prevention, or things you are trying to ensure

So:

• 会議の時間を忘れないように = so that I don’t forget the meeting time

Using ように here is more natural than ために.

会議の時間 means the meeting time or the time of the meeting.

Here, の connects two nouns:

• 会議 = meeting
• 時間 = time

So A の B often means:

• B of A
• A’s B
• B related to A

In this case, it means the time related to the meeting.

Because 時間 is the direct object of 忘れない.

The speaker is not forgetting what?
They are not forgetting the meeting time.

So:

• 会議の時間を忘れない = not forget the meeting time

Even though this whole part comes before ように, the internal grammar still works normally: 時間 is the thing being forgotten, so it takes を.

They are doing two different jobs.

1. 忘れないように
   Here, に is part of the grammar pattern ように.

2. 手帳に
   Here, に marks where the sticky note is being attached.

So the two に are unrelated in function:

• first に = part of ように
• second に = location/target of 貼る

に has many uses. It does not only mean to.

With verbs like 貼る (to stick / attach), に can mark the place or surface where something is attached.

So:

• 手帳に付せんを貼る = stick a sticky note in/on the planner

In English, we might say in my planner or on my planner page, but Japanese uses に to mark the location where the note is placed.

貼ります is the polite non-past form of 貼る, which means to stick, to paste, or to attach.

So 付せんを貼ります means:

• I stick a sticky note
• I put a sticky note on/in it

It is used because a sticky note is something you physically attach to a page or surface.
That makes 貼る the natural verb here.

Japanese often leaves out the subject when it is clear from context.

So even though the sentence does not say 私は, the meaning is naturally understood as something like:

• I put a sticky note in my planner so I don’t forget the meeting time

This omission is extremely common in Japanese and does not sound incomplete.

Japanese non-past can cover several meanings that English separates more clearly.

貼ります can mean:

• I put / stick
• I will put / stick
• I habitually put / stick

The exact meaning depends on context.

In this sentence, it could mean:

• a habitual action: I put a sticky note in my planner so I don’t forget
• a near-future action: I’ll put a sticky note in my planner so I won’t forget

Both are possible.

Usually, 手帳 means something like a:

• planner
• datebook
• schedule book
• personal organizer

It is not just any notebook.
That is why this sentence sounds natural: a person puts a sticky note in their planner to remember the meeting time.

If it were just a general notebook, Japanese might use ノート instead.

The comma separates the purpose part from the main action:

• 会議の時間を忘れないように、 = so that I don’t forget the meeting time,
• 手帳に付せんを貼ります = I put a sticky note in my planner

It makes the sentence easier to read.
The comma is natural here, though in some cases Japanese punctuation can be somewhat flexible.

Yes, Japanese word order is flexible, but this version is very natural.

The sentence first gives the purpose:

• 会議の時間を忘れないように

and then the main action:

• 手帳に付せんを貼ります

That order is easy to understand and very common.

You may sometimes hear different orderings in conversation, but for learners, this structure is a good standard pattern:

purpose + main action