timezone_utils 0.0.1

A lightweight, zero-dependency UTC-first utility class for safe timezone operations. Provides expiry checks, time differences, day/hour calculations, and migration helpers.

0.0.1

• Initial release.
• Added TimezoneUtils utility class for UTC-first datetime and duration calculations.
• Introduced time difference operations: timeDifference, daysDifference, hoursSince, and minutesSince.
• Added time expiration management: isExpired, createExpiryFromNow, and hasTimePassedSince.
• Added precise day boundary extraction: startOfDayUtc and endOfDayUtc.
• Included duration arithmetic handlers: addDurationUtc and subtractDurationUtc.
• Provided period validation functionality: isWithinTimeRange.
• Added UTC migration helper for existing datasets: migrateToUtc.
• Built-in nowUtcOptimized for high-performance immediate UTC timestamps.