zlib.ZipEntry.modified

The entry's last-modification time. When the archive carries a higher-fidelity timestamp in an extra field - an NTFS (0x000a), Info-ZIP extended (0x5455), or Info-ZIP Unix (0x5855) field, as most modern tools write - that absolute (UTC) time is used; otherwise the coarse, local-time MS-DOS date/time field (2-second resolution) is used.

Some tools store their high-fidelity timestamp only in the local file header, so on a file-backed entry (one returned by zipFile.get()) the first read of this property may perform a small synchronous positioned disk read to resolve that header. If that read fails, the value silently falls back to the central-directory data.