Step 1: Understanding prepositions of time.
Use "in" for months and years, and "at" for specific times.
Step 2: Analyzing the options.
Option (A):
Incorrect. "On" is used for specific days, not months, and "during" is not suitable here for a specific time.
Option (B):
Incorrect. "In" is correct for months, but "for" is incorrect for specific times.
Option (C):
Correct. "In" is used for months, and "at" is appropriate for specific times, like midnight.
Option (D):
Incorrect. "Within" is not used for specific months, and "in" is not the right preposition for times like midnight.