the New Year mood, took the afternoon off, should have taken the whole day off, If I had done that, it would have been, 11 consecutive holidays.

I'm in the New Year mood. I took the afternoon off the day after tomorrow, it should've had whole day off. If so, it should be 11 day off.

ChatGPT

I'm in the New Year mood. I took the afternoon off the day after tomorrow; I should have taken the whole day off. If so, it would have been an 11-day break.

I only took half a day off in the afternoon the day after tomorrow, but I should have taken the whole day off. If I had done that, it would have been 11 consecutive holidays.

Notes:

1. The original sentence is already quite clear and natural, so minimal corrections were needed.

2. Changed "If I did that" for proper verb agreement to "If I had done that" in the second sentence.

3. Ensured consistency in verb tenses for clarity.