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LocalDateTime

Medium Priority20 min readUpdated June 6, 2026

LocalDateTime is the right type when one value has to carry both a date and a time of day: an order placed at 2:30 PM on May 14th, a daily report cutoff at midnight, a price drop scheduled for next Friday at 9 AM. This lesson covers how to build a LocalDateTime, how to slice it back into its date and time parts, how to do arithmetic that crosses day boundaries, and one important caveat: a LocalDateTime has no timezone, so the same value means different absolute moments in different places on Earth.

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