![]() Last modification date/time of a file is constant on Windows 2000 and Windows XP.īut on Windows Vista and later the displayed file times on FAT media depend on daylight saving time and automatic adjustment for daylight saving time. Prior Windows Vista the file times on FAT media are independent on change of time zone, daylight saving time setting and automatic adjustment of daylight saving time. File times behavior is equal for files and directories on all Windows versions supporting NTFS.īut how file times on FAT media are interpreted depends on version of Windows. NTFS is supported by all Windows NT versions. This 1 hour time difference caused by the daylight saving time adjustment must be taken into account on comparing file times on NTFS and FAT media. Disabling this option in clock settings of Windows results in an immediate change of the displayed file times on NTFS media by -1 hour, and also many files on FAT media depending on version of Windows. There is the setting for automatic adjustment for daylight saving time which becomes important when being enabled as by default and currently set time zone defines a daylight saving time adjustment.įor example, daylight saving time is active currently in Europe. Automatic adjustment for daylight saving time The time zone and daylight saving time settings could be important depending on version of Windows also for files on a FAT media. ![]() and if automatic adjustment for daylight saving time is enabled currently.Ĭhanging any of those 4 parameters results in an immediate change of ALL displayed file times of files and directories on NTFS storage media.įile times on FAT media are more or less constant as using local time on creation, modification or last access, but read further for details.Īs file times on NTFS media are stored in UTC, but displayed in local time, the current time zone and the daylight saving time for this time zone are important for file time comparisons, especially when done for files on NTFS and FAT32 drives.if current time is within daylight saving period,. ![]()
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