I have a question.
Which sentence is correct?

①I didn't know that the country also had Golden Week.
②I didn't know that the country also has Golden Week.

Thank you!

Question

I have a question. 
Which sentence is correct?

①I didn't know that the country also had Golden Week.
②I didn't know that the country also has Golden Week.

Thank you!

Answer

they are both correct. the first may be more common / natural because both verbs are in the past tense.

But if the fact is true and always true, it is perfectly okay to say "has"