Question

during the week from the 6th to the 13th of December, I ____ my brothers wedding in my home country.​

Answer 1

Answer:

have / had

Step by step:

here the pronoun is ' I ' . so it takes have in present and had in past.

Answer 2

During the week from the 6th to the 13th of December, I have been invited to my brother's wedding in my home country.

• Have been will be the most suitable form of verb to be used here because the event will happen in near future.
• I will be followed by have not has because it shows singularity.