X-Install-Date (wpkg-status)

The X-Install-Date represents the date and time when the package was first installed in your target environment. The date is generated by wpkg at the time it is installing the package.

Note that thsi field is not modified when the package gets upgraded. Instead, the X-Last-Upgrade-Date field is used in that case.

Another important note: when the package gets removed, this field stays and only represents the time when the package was installed and not that the package is currently installed.

The date is written using the RFC-2822 format as defined for the Date field by Debian.