Here is a list of all documented files with brief descriptions:

[detail level 1234]

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nfx
datetime
DateTime.h	Cross-platform DateTime class with ISO 8601 support
DateTimeOffset.h	Timezone-aware DateTime class with UTC offset support
TimeSpan.h	High-precision time interval representation with 100-nanosecond tick precision
detail
datetime
Constants.h	DateTime and DateTimeOffset constants for cross-platform compatibility and ISO 8601 support
DateTime.h	Main umbrella header for nfx-datetime library