: Shows that the archive has been compressed using gzip to reduce its file size. Technical Context Naming a tar file with date - linux - Stack Overflow
: Indicates it is a "Tape Archive," a container format that bundles multiple files while preserving metadata like permissions and directory structures.
: A standard delimiter used in ISO 8601 to separate the date from the time. 145653 : The time in 24-hour format (14:56:53 or 2:56 PM).