レッスン日を変更してくれてありがとうって英語でなんて言うの？

・Thank you for changing the lesson day.
レッスン日を変更してくれてありがとう。

Thank you for readjusting the lesson と言いますと「レッスンを再調整してくれてありがとう」という意味になりますので、「レッスンの内容を再調整してくれてありがとう」という意味でもとらえられます。
readjust は 再調整、という意味です。

それより、
Thank you for changing the lesson day.
(レッスンの日を変更してくれてありがとう)
又は
Thank you for adjusting your schedule.
(予定を調整してくれてありがとう)
と言うのがいいと思いますよ。

参考になれば嬉しいです。

If you would like to thank your tutor for changing the time of your lesson, you can say something like "Thank you so much for changing the time of our lesson, I really appreciate it." By using the word "appreciate", this shows the other person that you are very thankful for whatever it may be that you are speaking about.

We use "re" in front of a word when we are saying that it something that has already happened before. Examples: rewrite, redo.If you use readjust, then it means that you already moved the lesson once before! If you haven't moved the lesson before this request, then you would just change the word "readjust" to "adjust". It would then be: Thank you for adjusting the lesson time.

You could just simply say "Thank you for changing the lesson time" when, in the future, you just like to change the hours and want to thank the teacher for understanding. You could use "Thank you for changing the lesson date and time." when you changed the lesson to a whole different day! Hope this helps and thank you for your question.

When you want to change your English lesson, and you want to thank your teacher for doing this and helping, then you can use one of these two sentences. They both mean the same, however, I would personally say that the first is a bit more formal than the second.

For example.
Thank you for understanding and changing out lesson to another day.
Not at all, it is perfectly fine for me.
So, I'll see you on Tuesday, not on Monday then?
See you then.

I hope this helps.
Have a great day.
Will

You are in a formal situation , so begin with a 'thank you' or 'I appreciate' in order to be polite.
You can quantify the strength of your appreciation by adding a 'really', as in the 3rd sentence.
Other vocabulary meaning 'changing' is altering / adjusting / rearranging /

Situations where this word/phrase is used: social, business, formal, informal, education, student-teacher communication.
Type of word/phrase: standard language
Example of this word/phrase:
"Thanks for rescheduling my lesson to another day."

As long as you say 'thank you', you can provide as much or little extra to the conversation as you want!

'Thank you for changing our lesson time' is equally as acceptable as 'I really appreciate you letting me change our lesson reservation.'
We say 'appreciate' in this context to demonstrate our thanks and gratitude.

Native speakers will say like this: “Thanks for rescheduling our lesson, teacher!”.
There are lots of other ways to say it, but this one is the most accurate and most commonly used.
Here is an example on how to use this in a conversation:
A: Teacher, can we change our lesson to another day?
B: Yes, no problem.
A: Thanks for rescheduling our lesson!

When you have a class or classes planned for a specific time, that is considered your "schedule." Often times, an administrator at a school or college gives a student a list of classes they must attend and it is considered one's schedule. "Adjust" means to make changes to something so that it is more suitable to a person's liking. You can adjust the time on a clock or adjust the temperature on an air-conditioner.

To reschedule a lesson is to cancel a lesson and book it another day or time. It is done when the teacher or the student can't attend the class. It can also be used for other actions.
Example:
-I am to busy tomorrow in the office, I will have to reschedule our meeting.

こんにちは。
様々な表現があると思いますが、例えば下記のような言い方もできます：

・Thank you for changing the lesson to a different day.
別の日にレッスンを変更してくれてありがとうございます。

change は「変更する」という意味を持つ英語表現です。
ぜひ参考にしてください。