I will have to assume that the correct sentence is:
In honor of best friend's day, I was given a necklace.
It is only by doing such a thing that your question can be answered.
In that above sentence, the verbal structure is Passive.
The passive voice is constructed by placing the normal subject of a sentence at the end making it the agent of a passive voice sentence, at the same time the object of the sentence becomes the new subject of the sentence. The agent still performs the action of the verb, but the verbal structure is placed before the agent to stress the importance of the action over the agent who executes the action. Example:
Active voice:
I eat pizza every day. Subject+ verb+ Object
passive sentence conversion: object + verb + agent
Pizza was eaten by me.
Having said the former, we can clearly see that in this sentence there is a passive structure:
In honor of best friend's day, I <u>was given </u>a necklace.
So, the final asnwer for your question is:
Passive
