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Why this exists Time is in nearly every operations task: log timestamps, retention policies ("delete files older than 30 days"), certificate expiry, scheduled jobs, SLAs, outage durations. It is also where bugs hide,…

Java Basics: Dates, Times, Time Zones and Durations with java.time

Handle time correctly in tools and services: Instant versus LocalDate versus ZonedDateTime, time zones and daylight saving, retention cutoffs, outage durations, certificate-expiry maths, parsing and formatting, and a fixed Clock so time-based code is testable.

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