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.