InstallDate
Variable that is set to the current date on the target system when the installation starts, in the format YYYYMMDD (4-digit year, 2-digit month, 2-digit day of the month). The date is set according to the local timezone. It can be used safely in file or folder paths.
Tip: The related variable Date contains the same date in a more conventional format, suitable for display purposes. However, Date cannot be used safely in file or folder paths.
Usage
You can refer to this variable as <InstallDate>. Do not set this variable; it is set by the installer.